Edit Map Cap Zones

Hello, I'm a complete noob when it comes to editing/making maps, but I was just wondering how difficult of a task is it too change capture zones on currently existing maps; so for example there are 6 capzones on a certain map, i'd like to move them to different locations, make the capzones smaller, take less time to cap, and make more of them (say 10 zones total).

I'm wanting to do this to create a sniper only tournament on www.ro2arena.com; but of course, we need to edit the maps first :) ...

So yeah, how much of a difficult task would it be to move/edit some capzones on a pre-existing map?

Thanks a lot, Sah/Corsair831.

Edit Map Cap Zones