How to create a NST instance with a powershell script:

Set-ExecutionPolicy -ExecutionPolicy Unrestricted
Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy Unrestricted

Import-Module "C:\Program Files\Microsoft Dynamics NAV\100\Service\NavAdminTool.ps1" -DisableNameChecking

# Set varaibles for NST
$NAVServiceInstance = 'instance-name'
$DatabaseName = 'database-name'
$DatabaseServer = 'database-server'
$NAVServiceUser = 'service-account'
$NAVServiceUserPW = 'service-account-password'

$DefaultTimeZone = 'Server Time Zone'
$MaxUploadSize = 2047
$EnableTaskScheduler = 'False'

$UseNTLM = $TRUE

$SOAPMaxMsgSize = '5120'

$ChangeTimeout = $FALSE
$IdleClientTimeout = '01:30:00'

$IsNAS = $FALSE
$NASArgument = 'JOBQUEUE'
$NASCodeunit = '450'
$NASMethod = ''
$DefaultCompany = ''

$IsNOR = $FALSE
$LanguageID = '1044'
$Language = 'no-NO'

# NAV Service Account
$secpasswd = ConvertTo-SecureString $NAVServiceUserPW -AsPlainText -Force
$mycreds = New-Object System.Management.Automation.PSCredential ($NAVServiceUser, $secpasswd)

##Creating NST
New-NAVServerInstance $NAVServiceInstance -DatabaseName $DatabaseName `
                                          -DatabaseServer $DatabaseServer `
                                          -ManagementServicesPort 7045 `
                                          -ClientServicesPort 7046 `
                                          -ODataServicesPort 7048 `
                                          -SOAPServicesPort 7047 `
                                          -ServiceAccount user `
                                          -ServiceAccountCredential $mycreds `
                                          -Verbose

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName ServicesDefaultTimeZone `
                             -KeyValue $DefaultTimeZone `
                             -WarningAction SilentlyContinue

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName ClientServicesMaxUploadSize `
                             -KeyValue $MaxUploadSize `
                             -WarningAction SilentlyContinue

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName EnableTaskScheduler `
                             -KeyValue $EnableTaskScheduler `
                             -WarningAction SilentlyContinue

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName ServicesUseNTLMAuthentication `
                             -KeyValue $UseNTLM `
                             -WarningAction SilentlyContinue

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName SOAPServicesMaxMsgSize `
                             -KeyValue $SOAPMaxMsgSize `
                             -WarningAction SilentlyContinue
                             
                             
##Creating NAS
IF ($IsNAS) {  
Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName ClientServicesEnabled `
                             -KeyValue FALSE `
                             -WarningAction SilentlyContinue

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName SOAPServicesEnabled `
                             -KeyValue FALSE `
                             -WarningAction SilentlyContinue

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName ODataServicesEnabled `
                             -KeyValue FALSE `
                             -WarningAction SilentlyContinue

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName ManagementServicesEnabled `
                             -KeyValue FALSE `
                             -WarningAction SilentlyContinue

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName NASServicesStartupArgument `
                             -KeyValue $NASArgument `
                             -WarningAction SilentlyContinue

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName NASServicesStartupCodeunit `
                             -KeyValue $NASCodeunit `
                             -WarningAction SilentlyContinue

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName NASServicesStartupMethod `
                             -KeyValue $NASMethod `
                             -WarningAction SilentlyContinue

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName ServicesDefaultCompany `
                             -KeyValue $DefaultCompany `
                             -WarningAction SilentlyContinue
}

##Set Idle Client Timeout
IF ($ChangeTimeout) {  
Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName ClientServicesIdleClientTimeout `
                             -KeyValue $IdleClientTimeout `
                             -WarningAction SilentlyContinue
}

##Set Services Language
IF ($IsNOR) {  
Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName DefaultLanguageId `
                             -KeyValue $LanguageID `
                             -WarningAction SilentlyContinue

Set-NAVServerConfiguration   -ServerInstance $NAVServiceInstance `
                             -KeyName ServicesLanguage `
                             -KeyValue $Language `
                             -WarningAction SilentlyContinue
}

#Add NAVService to portsharing and start Service.
#Import-Module $PSScriptRoot\NAVServerInstancePortSharing.ps1
#Enable-NAVServerInstancePortSharing $NAVServiceInstance