+1 to all of the above.   Apparently a simple saw wave & a free ampsim might not be that horrible (this randomly appeared on my youtube page today): https://www.youtube.com/watch?v=gioyIzQVCqs
 
 

Even the clean guitar fro TTS 1 fed through an amp sim like TH1, Amplitube or Guitar Rig will sound more convincing than most fuzz and distorted guitar patches.
 
There is a related thread here http://forum.cakewalk.com/Strum-Acoustic-vs-RealGuitar-m3017030.aspx
 
The MusicLab Realstrat and Real LPC, Guitars from Ample Sound and Kontakt based products from the likes of Orange Tree Samples and Indiginus are all very good guitar VSTs. The add different articulations, strumming engines, chord detection techniques etc. to help you play like a guitarist.
 
The "lead guitar" on the track in my signature is Realstrat through Amplitube.
 
 

I've got a DSF Guitars Soundpack for Sound Center. I was just playing around with Nylon Chords and Telecaster as a base.
 
TH2 - THe Crunch, THe Lead, TH Recto, Knife 
 
Lepoulin's Amps - esp LE456-A
 
I just did a search on Google too and found Auraplug's Freetortion Plugins including specific 'fuzz tone' FX.
(perhaps not as good as above (?)).
 
But all sound OK to me. Agree with the technique stuff though.