There is the http://sourceforge.net/apps/mediawiki/morrgraphext/index.php?title=Main_Page which can at least offer a guide on how to get most things functioning.
Since everyone has different computer specs, it's difficult to make a precise guide that would do the detailed work for you.
And of course, asking for help or advice in the current MGE thread is the best way to get results.
I failed to mention that I've already used the wiki, with identical failure results
Especially at distant land generator (last time I tried, it was the same as Vanilla, but without the fog....really ugly...).
As for the specs, I've a pretty decent computer (Phenom II 920 4 cores, 4 gb RAM, nVIDIA 9600 GT), so I'm aiming pretty high.