Yeah, I actually have the aforementioned 'monster hands' - but I still need to practice and stretch to get the reach I want. I actually do more stretch & stamina practice away from the guitar - I basically stick the wide part of my arm between two given fingers, and flex the fingers twice a second for about two minutes, and when that's done I move my hand to a slightly wider part of my arm, until they're either stretched well or I run out of arm, in which case I use my thigh (or my chemistry book, they both work). It's important to keep flexing the fingers at a steady pace so they don't get lazy, otherwise nothing will happen. These do actually work, by the way - at least for me they do - and in addition to what Bizarro said, you'll have it down in no time. Just don't hurt yourself.