I had som free time, so i decided to look a bit into the code of cod4 and modded the map settings menu of mw2.

 

Download

 

Custom iw4m.dll for new maps menu.

edit: Not needed anymore

Thats cool. I was trying to add oilrig and burgertown on bonus maps but fail

in bonus maps, there is another option called new maps, there I put all new maps like oilrig and so

Thats cool. I was trying to add oilrig and burgertown on bonus maps but fail

The problem with that is that it uses feeder 4 which also controls the map preview so you cant hook the feeder to add more maps without breaking the map preview.