Yeah it would only format the one because to the drive they are two seperate discs. You'll have to do it using the Windows installation disc at bootup, modifiying the partitions when it asks using the commands to delete the partition and then it'd format the drive with one 80GB partition again.
Partition Magic even though it costs money is worthwhile to anyone who wants to re-arrange partitions alot though, and could be worth considering. It would at least mean you wouldn't have to keep formatting anyone reading this!
Hehe plus when i partitioned this drive, I made 4 on the 120gb drive for each of us using the PC. I gave my dad only 2 gig though
and he wants more now even though he has his laptop, and I just said tough...