OOTP5 or OOTP6, both will crash at the end of the game with the sound on if you are using Windows XP with SP2....
You can try to update drivers (which I tried as naseum) but most likely the "sound off" option will be your best bet
As to editing - there are editors out there, but I've never used them... someone else who is more familiar with an editor will have to answer that question...