Installing Vista from a Memory Card

I figured there must be an easier way … maybe I could format a USB drive or memory stick? Well, you can … but the thought dawned on me: If you can boot and install from those media, then why not a CF card in a card reader? My reasoning was that I didn’t want to format either my USB drive or 16Gb memory stick … they have all my files on them! However, my digital camera has a rather healthy 4Gb CF card in it that could easily be formatted.