Restoring Mac Pro using time machine and reformat/delete partition

[Quasimoto16]

I wasn't sure where to post this because it does pertain to windows installation I will post it here. I currently have windows 7 64 bit installed on my Mac Pro (1,1) on a 100GB partition. I need to reinstall windows 7 using jowies method and also update some drivers so at the same time I will reduce the windows partition to 32 GB so it can be formated as FAT32. So my question is first off how I should go about the reformating of the drive, I think i will have to reformat the whole drive then do a restore from backup. Then repartition the drive using boot camp and reinstall windows. Will the OS X disc allow me to delete and reformat drive? any suggestions would be much appreciated.