Finding and deleting all mods

Ok so I want to play with grand campaign bro but i've had mods in the past that I'm not sure I got rid of as its telling me the versions differ.

Also says the versions differ with everyone online. He has more expansion packs than me but I heard thats fine.

How can I make sure I delete all my mods and then start fresh with installing the same ones?

Pls respond

http://www.twcenter.net/forums/showthread.php?t=396175 Try this tool.

Cheers buddy that worked and got in game with him, however I've got another problem now as I'm unable to check my diplomatic relations as the button is greyed out and doesn't work, any ideas?