If you select RAW+L in the "Quality" menu from the 5D, there should be both a RAW (cr2) image and a jpg on your memory card. If you use Canons Zoombrowser to transfer images from your camera both files are transferred.
If you have direct acces to you memory card by putting it into a card reader connected to your PC you get something like this:
(N:)DCIM/100EOS5D
in this directory there should be two files for every image you shoot (CR2+jpeg).
If you set your 5D to RAW only (Quality menu, bottom right column), you only get RAW files and not the jpeg.
I hope this helps.