Portable Apps Launcher Closing Immediately

So I've been trying to make a portable copy of CivilizationIII so I can run it off of the network drive at school. I've already figured out what registry keys it needs to run, but I'm ignoring them for now anyways. Right now, the game is just staying in the same directory, not changing any keys.
I put everything in what seems to be the correct format, and the launcher was created successfully. However, when I click it, nothing seems to happen. A splash screen doesn't even show up. When I look in task manager I see the launcher running for a few seconds, then the game exe starts for a few seconds, and the both close. When I click the exe normally without the launcher, it works fine.

Any ideas?