[Wine] A few questions about trying to fix WINE for running a game correctly

[DARKGuy .]

Hi people :)

Eating dinner today I came up with the idea of installing Most Wanted
and try to get it working correctly. It has two issues: Carreer mode
doesn't start after the first FMV, and sound stutters/hangs forever
after 2-3 secs of starting any quick race.

I have some knowledge of C/C++, or at least I think I'm ready to start
"hacking" at WINE's code. However there are some questions I have in
mind:

1. Should I use WINE git? if so, is there any guide?
2. When I compile WINE's code, must I wait 30 minutes for each
compilation, or will it update only the modified files?
3. Once I've fixed (or at least spotted) the problem, how do I make it
available for others to test and apply it into official WINE?

Thanks in advance :).