I'm more suprised the daemon tools one doesn't work When you send command lines to a batch file it works differently, so in GameEx, you have LaunchBefore=C:\Wherever\MyBat.bat "[rompath]\[rom]" Then in your MyBat.bat you have @ECHO OFF c:\winipac\winipac.exe c:\winipac\profiles\ssf.ipc "c:\program files\daemon tools\daemon.exe" -mount 0,%1 I'm not sure what your doing wrong with the winipac line, but with the daemon tools line, %1 is replaced with what is sent through the first paramenter (ie. "[rompath]\[rom]")