SimCity 3000 Unlimited: Unlock supported resolution

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script.ps1

$ErrorActionPreference = 'Stop'

function Get-ExecutablePath {
    $key = 'HKLM:\SOFTWARE\WOW6432Node\Electronic Arts\Maxis\SimCity 3000 Unlimited'
    try {
        $dir = Get-ItemPropertyValue -Path $key -Name 'InstalledPath'
    }
    catch [Management.Automation.ItemNotFoundException] {
        Write-Error -Message 'The game is not installed.'
    }
    Join-Path -Path $dir -ChildPath 'SC3U.exe' -Resolve
}

function Unlock-Resolution ([string]$File) {
    $p = (
        '8b-4c-24-04-8b-44-24-08-53',
        'c2-08-00-90-8b-44-24-08-53'
    ), (
        '8b-4c-24-04-8b-54-24-08-81-f9',
        'c2-08-00-90-8b-54-24-08-81-f9'
    )
    $data = [BitConverter]::ToString((Get-Content -Path $File -Encoding Byte -Raw))
    $data = $data -replace $p[0] -replace $p[1]
    Set-Content -Path $File -Encoding Byte -Value (Convert-HexStringToBytes -String $data)
}

function Convert-HexStringToBytes ([string]$String) {
    return $String -split '-' | ForEach-Object -Process {
        [Convert]::ToByte($_, 16)
    }
}

Unlock-Resolution -File (Get-ExecutablePath)

About the hack trick, please check this page.