Help...New to IB!

Ok, I downloaded and installed v. 7.04 last night and after the first custom battle, I instantly fell in love with the game..Good Job!

But, it depresses me to see that I get random crashes all over the place. They happen at random and unpredictable times:

1. After the BI introduction video plays...
2. After selecting the units for an ERE and Hun custom battle and clicking the arrow
3. After destroying a Slav Army in custom battle
4. Trying to begin a campaign, the game crashed saying something similar to "cannot find Alemanni Diplomat.tga"

I have BI installed to version 1.6. Is the game just very buggy or is there perhaps something that I did wrong?