Priv2 is running too fast, you say? Are you using the DOS version or the Windows version?
As for the other games (assuming you're not using Kilrathi Saga), Mo'Slo should work fine; just make sure you use this syntax:
moslo /xx.x wing1.exe
where xx.x is the speed you want the game to run at, expressed as a percentage of normal system speed. Also, make sure you have the latest version of Mo'Slo from
http://www.hpaa.com/moslo/ .