A zero map means the (power commander?) does not change the stock fuel delivery, so won't always support intake and exhaust mods.
A fuel efficient map will vary delending on mods. From your other posts at http://rswarrior.com/forums/t/138856.aspx it seems you have a few mods. You'll want a map for your mods. Try looking on this site under DOWNLOADS (to the right of HOME). Also look on www.powercommander.com under the Warrior PC3USB and you'll find customer map files.
Remember to rename any .MAP file with the .DJM extension so the PC3USB recognizes the file.
To maximize air:fuel (mileage) you'll want an actual dyno tune.
daylon:
is a zero map a stock map or close to it, i need a fuel efficient map for the long rides