Then to get the cleanest reinstall unplug the 2tb, boot the Win7 DVD, wipe the 600gb HD using Diskpart Clean All
command: SSD / HDD : Optimize for Windows Reinstallation
Follow the tips here to get a purrfect reinstall - use the ones which apply: re-install windows 7
If you don't want to wipe the 600gb, then use the booted Win7 DVD Custom>Drive Options to Delete
the unwanted partitions, create New
one(s) there, then Format
before installing Win7 to first partition.