My First Experience with Spore's Creature Creator

I downloaded the trial edition of the Spore Creature Creator yesterday. It is in a word, fun. I've never been one to be big on creating my own characters in games. It's a nice feature when it's there but it has never been top of my must have features in games. Yet when I played around with the trial, I couldn't help but be amazed at the technology behind it.

The game is somehow able to take into account all the features that you can put on your creature and make them work in a real-world setting. My friends and I took turns trying to come up with the most improbable designs imaginable (one arm, one leg, spikes everywhere else) and the game still made them work. This little experience with the game convinced me to slap down the 10 bucks for the full version so I could play around with more of the parts.

It should be noted that before I was able to play, I had difficulty getting it to start. It would show the EA logo then immediately kick me out to my desktop. I tried everything I could think of until my one friend who knows computers a lot better than me. All he did was reinstall it and the game immediately started up. So when I downloaded the full game, I thought it would work. Unfortunately, it's back up to its old tricks and I can't get the damn thing to work. My computer meets the system requirements (it can handle Half-Life 2) and I'm pretty sure all my drivers are up to date. If anyone can help me out with this problem, I'd be eternally grateful. Also, have any of you guys had the chance to try it out?