There are a few ways to get a mod menu on MW2. The most popular method is to use a modded controller, which you can buy online or from a gaming store. There are also a few websites that offer modded controllers for purchase.
Another way to get a mod menu on MW2 is to use a USB modding tool. These tools allow you to mod the game files on your USB drive and then run the game from the USB drive. There are a few different tools available, but the most popular is the Modio tool.
The last way to get a mod menu on MW2 is to use a cheat engine. Cheat engines are programs that allow you to modify the game code and make changes to the game. There are a few different cheat engines available, but the most popular is the Cheat Engine tool.
All of these methods will allow you to get a mod menu on MW2. Choose the method that you think will be easiest for you to use and follow the instructions.