Aaaw Tampalizard,
Sorry to hear that. But don't kick yourself too hard, Money & Banking is considered by most people to be the hardest of all the DANTES exams.
The good news is that Intro to Business is definitely an exam that many people would consider "easy".
If you don't already own the book, please go to the following web site and download "The DSST Official Test Preparation Guide" (seventh book down...it's FREE!):
http://www.petersons.com/airforce/books.asp
It contains a whole section devoted to Intro to Business, including study material and mock exams. It is extremely helpful! This, in combination with Instantcert, is more than enough to do well on this exam.
You'll do great!
Good luck Tampa,
Snazzlefrag