I use Magic Engine.. I also use Daemon Tools Pro.. I've come up with this (launch before) command in gameex "C:\Program Files\DAEMON Tools\dtpro.exe" -mount 0,"[RomPath]\[RomFile]" What happens when I click on a rom in gameex is that it opens daemon tools but I see no mount occur.. and it never does occur.. an empty virtual drive has been set up.. but no mounting ever occurs.. So it is definitely recognizing the opening daemon tools part of the command, but not the mounting part. I based my command line on advice given by frequency here - (you will need to scroll down cause it starts off being about sega cd) But unlike what he is talking to I have daemon tools pro not daemon tools lite. I made sure to check for things like extra quotes and stuff like that.. but it all looks correct.. Any immediate advice to get this working before I export my settings?