mohaa maps are in pak5.pk3?, but that won't help. they are saved as bsp files and, although you could use a bps to map convertor those a.) don't get all the brushes b.) take forever to load in mohradient... you are better off making your own maps.
#1 Dont POst in the "New map Release" forum.
#2 To edit curent maps you can either Convert it. Which is NOT a good idea. OR Contact EA and ask them for the original map. Which will not work by the way.