Sorry, long day at work. The file size didn't register correctly. Those are some giant files. Definately need to .rar them into smaller files. Rar would definately be better than zip, as it seems to handles AV files much better, though I don't know if it's been incorporated into a Mac program. The ones I've seen mostly support zip, tar, gzip, and stuffit. Also found some links for you.
<A HREF="http://mac.tucows.com/filemanage_splitters_default.html" target="_new">http://mac.tucows.com/filemanage_splitters_default.html</A>
<A HREF="http://mac.tucows.com/general_compression_default.html" target="_new">http://mac.tucows.com/general_compression_default.html</A>
Jarrett