Hmmm. You're running 4 IDE devices, so I presume (with my psychic powers) that you're running 2 CD and 2 HDD drives? Try unplugging one of the CD drives (unless you can run the games without the CD's...I suggest Daemon Tools (for legit purposes only) for mounting image) and the secondary HDD (unless you have system files on it or if it is a stripped drive) and any cards that you don't need to run the game (ethernet cards, internal modems, SCSI adaptors, etc) and see if you can take some of the load off the PSU...then try....however if it still locks (after also testing it with a better PSU) then you may want to look at the cooling. If you'e anything like me (get that shoicked look off your face, i'm not that wierd
: ) then you'll also find this interesting:
http://www.madshrimps.be/gotofaqlink.php?linkid=2239