Bad comparison m8... you should google for Kit Cars sometime ;-)
Here's a link to help you get started: http://www.marlinsportscars.co.uk/sportster/self-build/
About ARMA2, yes I have issues running it - but yet... the icon... it's so tempting... it just keeps pulling me back, and everytime I get to have a great time...
All it needs is a little time, just like ArmA 1 and OFP. Next year it'll blow everything pretty much out of the water.
Huzzah for BIS!