And if you don't have it, i recommend you to take DIRECT2U. BEcause it's a lot better than downloading from P2P networking everytime..
this link contain a link to download direct2u and pics from backwoods and momentum:>>>>>>>>>>>>>>>>>>
http://www.halo2ce.epgservers.com/index/?index=48
just download direct2u and dubble click on the direct2u icon and you will make it!! if not tutorial link below....

If someone want to download the maps normally and not from direct2u than go here and the PICS of each map here:
http://www.halo2ce.epgservers.com/downloads/
or here maybe here:
http://halomaps.co.uk/index2.php
The halo 2 maps out so far:
H2 Backwoods
H2 Momentum
H2 Warlock
New Mombassa (H2) - Updated!
Zanzibar (H2) - Updated
H2 Blood gulch (not coagulation!)
H2 Beavercreek
you can get them all from direct2u and those links
for the once who want the tutorial from direct2u here:
http://www.halo2ce.epgservers.com/tutorial/?index=9
ENJOY
