To Darkblade:
I'm not trying to be an ass here or anything, but you must have done something different then the instructions say.
I just, just now did a Clean install of RunUO 1.0.0, and dropped my system in the Custom folder, deleted the original SkillCheck.cs, Spellbook.cs, BaseArmor.cs and BaseWeapon.cs and made the change to playermobile.
It worked fine on the first compile.
The scripts you are getting errors with are not part of my system, they are not editted in my system. And reading the base scripts I just installed, the errors you are getting point to lines in both those scripts that you have editted or replaced, because the scripts I installed fresh do not mention Moongate or anything on those lines.
I am sorry you are getting errors, but once again, follow the instructions and it should work fine.
A clean install simply requires the system to be dropped in and the 4 scripts to be replaced.