Modify Levels/Maps for Classic Game Desert Combat £250

I'm in need of a PROFESSIONAL programmer who can modify game files (mainly the levels/maps) of the format .rfa and .con from an old game of 2002/2003 named Desert Combat. This game is known as a patch for the game Battlefield 1942... (Budget: £20 - £250 GBP, Jobs: C# Programming, C++ Programming, Game Design, Game Development, Game Testing, Game UI, Programming, Unity, Unreal Engine)