Drag Poptires.cs into your scripts folder, if you don't have one make one!
that's it just run GTA afterwoods and press 'I' in game and all the vehicles tires near you will pop!

You need Scripthook and Scripthookdotnet to run these you can get them here.
http://www.dev-c.com/gtav/scripthookv/
https://github.com/crosire/scripthookvdotnet