You know, it took around 60secs of search the forum to find it
http://forum.mtavc.com/viewtopic.php?t=15151
you do need to downgrade to 1.00 to player MTASA and correct me if im wrong, but im sure u need 1.00 to play sa-mp too
hmm, this is the MTA 0.5 forum
so if you question is for VC then the patch only goes to 1.1 and its selectable in the client options
If its for san andreas, considering you said 2.00 then SEARCH the help forums, there is a downgrade patch for it