so far I know, Eric is a good friend of Hans Zimmer, he used to make some sounddesign for him a couple of years ago! Most of Hans Zimmer guitars heard in his movie soundtracks are done by real musicians, but if you have the Spectrasonics Hans Zimmer Guitars 1 and 2 you are pretty sold on guitars, ... (btw the bariton guitar is on Vol.2), ...
I know it's hard to get into this hole sampling think, but do yourself a favor just buy what you really need, ... (your libraries will grow anyway over the years) ... !
I just followed your threads and saw you are looking for some advices, ...
I hope this helps at least a little bit, make music , get good quality stuff and enjoy, ... in the end all musicians are much better than samples (I am talking about musicians not "wanna bees, [;)]!)
best, andy