Mapper needed to add a boss fight to Doom 3

[VGames]

Ok here's my idea and if somebody could do this for me it would sure take a huge load off of me.

I want to add the Spider Mastermind to the game but I want it to appear after you kill the Cyberdemon and I want the fight to happen on the same map but with a few changes. Basically when you kill the Cyberdemon you watch him get killed by the Soul Cube and after it closes the Hell Hole instead of the cutscene cutting away to the part where the marines cut open that door the game goes back to a new scene where the Spider Mastermind spawns in at the opposite end of the arena from the way you came in there. And maybe you get a shot of the Marine standing there with a little fear on his face. I'm sure this can be done with existing animations. Then maybe you hear Betruger shout out something as the camera goes back to first person and the fight starts. The Hell Hole which is now closed up can be walked on by you and the boss to add to the arena and maybe a few more health and ammo pickups are spawned in some where in the arena to help you out. Maybe around the center of the arena. After you kill the Spider Mastermind about 5 to 10 seconds goes by before the screen goes black and then the cutscene where the marines are cutting through that metal door starts and the rest of the ending cutscene plays as normal.

Any takers? 

[VGames]

Well since there are no takers for my idea are there any good custom maps that have a big open area for a good boss fight?

[VGames]

Another thread I forgot to update. The Happy Friar has come forward to help me with this feature. So far what he has told me sounds amazing. He's gone beyond what I asked of him. So the Spider Mastermind will make a dramatic appearance in PD3.