Ok, list out all of your drives and total size of each drive (I mean the actually drive, NOT the partitions), and the connection of those drives (IDE, SATA, USB, etc.)
Then list the partitions that are on each drive. From there, we can decide what's the best way to partition your drives, where to install Windows, where to install programs, etc.
You can alter where most programs store their files, where My Documents is located, etc. but we'll get to that after we see the layout of your current drives and partitions.