Sigh. It didn't work. When I first started the game, it asked for the idmacdrv32 file. I added the jconfig and idmacdrv32 files you sent. The game started, I got the network connection errors within the game window and then it closed by itself without any errors. Got the same executable error when I tried with Game Loader.
Guess it has something to do with my system or drivers. The game won't even run in a VM of Windows 7 that I set up. So, doesn't look like I'll be able to play these anytime soon.
Thanks again for all your help! Sorry for the massive waste of time.