If all your pics are on one file then compressing it to a zip (or ace or whatever) format won't do anything because its only one file. Instead i recomend you use a file splitter/joiner. Go to
http://www.freebyte.com/hjsplit/#win32
and download HJSplit 2.2, it will allow you to split your excel file into 2 or more smaller .01, .02 etc files and then rejoin them on another computer (provided the other computer has the program as well). The only problem is that you will need to use more than one floppy to transport the split files and then copy them all onto the other computer and re-join. Not too bad if you have more than one floppy, otherwise you're stuck!