this may not help, but my setup for partitions has been:
*ALL NTFS*
C drive [10 GB] - Holds Win2k which has booted into 3 times in two plus years and the MBR
D drive [10 GB] - Main WinXP setup
E/F/G/H - the rest of the 80 GB drive broken up chunks no larger than 15 GB.
Just swapped my 60 GB out (it went to the *nix box for a College Linux installation earlier this afternoon) for a new 160 GB drive. Went against my better judgement out of necessity - I need larger partitions for DVD ripping - and set it up with four 40 GB chunks that ended up being O/P/Q/R drive.
pic: