I found a way to make this mod work for the steam version of MW2. Just download the RSE mod, Place it in Call of Duty Modern Warfare 2 folder, press yes on overwrite all files. And then just follow these steps here.and yes your gunna need to download (zsvrloadM1.iwd) or else your gunna get script errors. Also I found that I can only minimize the game when its on the multiplayer starting menu using the windows Key. Also you don't have to use the 'iw4mp.dat' to open the game but create a shortcut for 'miw4mp.exe' because you won't be able to lunch it from steam anymore.
You don't need to worry about the single player part because RSE only overwrites the MP part of the game.+1 vote. The bots aren't always good still. Sometimes they run into each other or run into walls, and they're either an easy kill or I'm the only one playing. They run around really fast and they're shown just sliding on the ground often. I've seen them exit doorways and they're floating in the air. The animation from standing to last stand is jumpy and I sometimes don't even notice they're dead, and before I know it they're on the ground killing me.
Ai Zombies Remastered
If there's an easy way to fix this, let me know, but the movement system with the bots feels really broken sometimes.+1 vote.