Depends what you are trying to achieve - a computer game will tell you which way the corners go but it won't teach you the best lines, braking points and so on.
If you really want to learn the tracks you'll be better off with a dedicated track guide like the one from MCN (pricey) or maybe try the free one from Visordown.
MCN:
http://www.demon-tweeks.co.uk/motorc...uit-guide-2012 Visordown:
http://www.visordown.com/motorcycle-...ide/22760.html