I had a similar experience Friday, R U sure you need to re-install all?
If the error says that your user is already in use, U just have to wait a
while, the server will refresh and you'll be able to log-in again.
Once your problem solved, navigating the client is not all that ***ce
you get used to the interface, a few tips here the server will install what
games you have installed on your computer, then opening the "game's" folder
you will have three subs : the "server" is where you chat and the "Session"
is where you play.
Once you have been in several (say F1 2001 & GT2001) you will have buttons
appearing for u to navigate between "Games"
Hope it's clearer now...
;o)