boot camp a mac running sl and ml

The title basically says it all. when i try to boot camp my mac it says my hardrive has to be a unpartitioned drive. i know mine is not, but is there some workaround? also, could i use target disk mode to boot from an older bootcamp partition on a different mac? it would be better if i could partition my mac, but if not would that work?
Thank you

No has to be the one single format for BootCamp. Perhaps SL can be installed on an external drive, or if you own a Mac Pro, on a drive set up in Bay Two. Helps if you provide model details.

The UI cannot be used if you've already partitioned the HD. You will have go through the harder command line way per these instructions.

I don't know about using target mode..

thank you for fast response.