1. Make the bit rate lower. But this may make the music sound terrible.
2. Try to use 7-zip to zip the goomod.
3. Ask davidc for help.

*inserts obligatory make-sure-your-songs-aren't-copyrighted comment* But iirc you're generally good about that kind of stuff.

What Mygod said^^. 7-zip can squeeze a bit of extra file space out, but not a whole ton. There are programs out there that have a lot more options than, say, Audacity for compressing OGG files (I have no idea about what programs these are, but I had an audiophile friend say this, so who am I to argue?).

If worst comes to worst, you can email davidc your goomod and he can upload it.
[his name] at [this domain]

or, you can split the goomod