If you paid cash and don't have the receipt that would pose a problem trying to get a refund. <img src="/ubbthreads/images/graemlins/cry.gif" alt="" />

The wizm.rar file is 148MB, while the wizmB.bic file that the error occurred with would be close to 80MB compressed.
Can you convince one of your friends that they should buy the game as well, and then borrow their second install CD? <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />