Perhaps you can explain your problem (perhaps from a workflow perspective). What you are asking for is a technical solution to something you have decided is the worfklow solution to your problem; however, if you can share the problem, there may be a more optimal workflow solution.
well, I have to provide 4x6 prints to my client as quickly as possilble and out of those he/she selects few for quality enlargements which i can do it later using RAW files. To get my 4x6 prints can drop my one cf/sd card in a digital lab and get prints immediately and at same time i dont want to handover my valued digital negs to them to fiddle with it.
You may want to store RAW+JPEG (small or medium quality) on the CF card. Then burn the JPEGs quickly to CD - perhaps portable laptop if that is what is required. Then throw the CD into the lab for printing. You could also burn 2 CDs - one for the lab, one for backup. Will add a little time to the process but doable with current technology, and if the CD gets scratched/lost/stolen you still have the originals in your hand.
If burning a CD is too slow, you can add a second card reader to your PC and copy the JPEGs from CF1 to CF2 - its not in camera process, but does what you originally required.