1. Will it work alongside GPx Patch?
Yes, does with me anyhow.
2.How does the Drive Through penalty thing work..?
Well correct me if im wrong, but when u take a shortcut the black flag flashes, but u dont slow down, u must drive into the pits, and straight through (it doesnt slow u down at ur pit garage)
Bah, i cant explain, just go get it and you wont regret it