$file = "UIrrigation_Impl.inc"
$text = Get-Content $file -Encoding UTF8 -Raw

$pattern = "Sched.IsDelaying      := False;`r`n          Sched.ActionStartTick := NowTime;"
$replacement = "Sched.IsDelaying      := False;`r`n          Sched.ActionStartTick := NowTime;`r`n          InitActionBaseValues(CurAct^);"

$text = $text.Replace($pattern, $replacement)
Set-Content $file -Value $text -Encoding UTF8