To my knowledge, unless they have improved them since I last bought one, a floppy only holds 1.4meg of data. So, unless you can compress the data to that or less, it can't be done.
But don't take my word for it, somebody out there may know a way, it's just that I haven't heard of it. let the thread run a while.
If the data is less than 1.4meg, just drag and drop it from the CD to the floppy in Explorer.