i am just starting out with mapping, and with the video help i am learning fast. i would like to make a map that i could set a 'sudden death' match at the end of the time limit, AND i would like to have monsters spawn once the 'sudden death' would start. is that possible, or am i just thinking toooo big!
P.S. i just thought he looked funny -->

You can't really make a map that works along with the server settings... at least not that I am aware of yet.

Although... because I don't know how to do it, doesn't mean it can't be done.

First question you need to test is... can a multiplayer map use monsters? You will have to create a test for this... small map, spawn points, create all the stuff to make it work in the mp game... and try it.

If that works, then you need to see if you can grab and use the server settings. You need to know this so that you can figure out when the match is nearing an end to begin the sudden deathmatch mode. Now... I have no idea how to create a new MP mode... so what I am talking about is giving the players a feeling that it's a sudden deathmatch game during the last moments of the game.

If you can figure this out, then you can create some other functions that have a countdown and/or other map features that present the players with a sense that sudden death is at hand.

A good place to search out the information for getting the server settings is here: http://www.doom3reference.com/

Look under the script link. These can be thrown into a script that runs with your map.