Burning Large files across multiple DVD's / CD's

Actually I don't think that is helpful and I should have been more specific. In this case I have downloaded Windows 7 an 8 gig application from the net. I want to store it on two DVD RW's. I did not want to just randomly split out the folders as I may need to re-install at some point using Parallels 5 to install - in which case it need to be self-continuing as once Parallels launches the install the .exe will attempt to extract files from folders in a particular order...ergo they need to be accessible.

I really do need to be very specific - the file is slightly under 8.9 gig, so my questions still stands, and although is incident specific, I am sure the answer would be helpful for future events.