I've wanted personally to look at doing a mod for halflife 2 or unreal2k4 for a DM level.. I need to do some creatures and props involving normal maps and the like for one of those engines anyway.. part of my job for the school I'm working at. and I need to do it before christmas

is there any skilled programmers who have a handle on one of those who would like to make it worth my while to do a DM level?
Here's basically what I need to do. I have to learn Z-brush to do normal maps. I need to design and animate a monster (maybe two), and I need to do a basic map with some textured walls and floor figure out the lighting and placing of weapons and such.
I'd be willing to do a sword, crossbow, monster (popular vote?), and one level (popular vote again?).
I understand there is a lot that would need to be changed to be accurate.. however, not everything need to be changed yet. Though I was thinking a mod of the gravity gun could perhaps be used to be a hand instead to pick up items, throw them, pull switches. etc. Not sure how the spell system would work but they have a particle system in there that does fire and smoke and lightning.. so just accessing "Weapons" through a unique interface I would guess is how it would work.. you hit the right "combination" and it activates the weapon. the "weapons" all use the same "ammo" which also regenerates. breakable doors are possible too.. characters holding items as well is there. Not sure about armour though.. that would be a larger modification I'm sure.
hmmm..
Anyway, if there is interest and skill there.. I'd be willing to give it a shot. As I said, I need to do something anyway for work.. so might as well go towards something..