Don't think you need SE to use the cable, but depends on what you have and how it is connected.
Clean installs are best, but suspect that you could make a dirty install over the top of a previous version.
Easiest way would be to put the install stuff for SE into a directory on the HD then reboot into command mode. Copy deltree into the root, deltree windows, and when done move to the install stuff and run setup.
CAUTION:
Doing this wipes out hardware drivers as part of the deletion and may create problems if you don't have current drivers available.
Ed Fair
Any advice I give is my best judgement based on my interpretation of the facts you supply. Help increase my knowledge by providing some feedback, good or bad, on any advice I have given.