Engine sound replacement

[Pandora Damont]

So I decided to take some engines from GRID Autosport to replace the engines in f1 2012.

I have done that and replaced the current manufacturers but when I go into career mode and load a race it remains in the loading screen for ages.

Am I doing something wrong?

Thanks.

P.S This is my first time posting, I am very unsure if this is the right place.