formating & partitioning

hi all,

i was useing a 80 Gb Maxtor sata HDD. i had to take it out for a reason that doesn't matter here.
i want to put it back in now and was wondering ????
A.) what size partitions should i make? last time i had it 40 & 40. i had OS and programs i used alot on c: and stuff i didn't use much on d: but i don't know what the best way to do it is.
B.) what file system is best, fat 32 or NTFS? i was thinking NTFS
C.)should i format and partition useing win 98 start-up disk, or win xp on the HDD i'm useing now, or the MaxBlast 4 disk i downloaded from Maxtor website? or does it matter?
D.) and finally, i have a win xp pro. upgrade disk. it won't load from dos so i have to load it from windows. i have a full copy of win xp home and win 98se, should i use one of them first (and which one is best) or keep the HDD im useing now in and put the 80 HDD in as a 2nd drive and load it from the windows i'm useing now??

any feedback and info anyone can send me will be greatly appreciated.
you can post it here or e-mail me at   or both so others can see your feedback also.
thank you in advance
danny