Two other workarounds are to fill up the USB drive with whatever so there is less than 2 GB of freespace, or to partition the drive to give you a 2 GB partition.
The better option may be to upgrade to Money Plus Deluxe Sunset from Money 2003 Premium. You would give up direct download of quotes and statements. You would gain an enhanced backup system that can keep a programable number ( 0 .. 99) of both upon-exit
and scheduled backups that are each timestamped in the filename. Plus the 2 GB problem goes away.