How to make custom controller look like a xbox 360 controller?

xblock controller emulator

I use Motioninjoy Gamepad Tool with my PS3 controller. Don't know about others, but you can pair it with a bluetooth adapter and play wireless.

From the title I thought you wanted to make your controller actually look like a 360 controller.

Try x360ce. I use it and it works like a charm.
Just download the latest library and app.

I use Xpadder