I am a bit confused by what you are telling me to do here, because I can't seem to select parts of the arm, when I click on the arm it selects the entire torso (both arms, and the body). Here is what happened though point by point:
2) then you need to separate the forearm from the bicep by clicking, then shift clicking, each dot below the elbow. Then mark that as a seam (do NOT separate) then do the same above the elbow. (you wil want the elbow to be both the 'Bip 01 R forearm' and 'Bip 01 R upper arm')
Okay, in the picture I've attached you can see what I did. As far as I can tell I did this right. I marked as a seam but did not separate. I did this both above and below the "elbow," (which was a vague term in this sense because it isn't really marked, but I ball-parked it). Anyway I was kind of confused about what the "you will want the elbow to be both th 'Bip 01 R forearm' and 'Bip 01 R upper arm'" part meant. I get the lingo, I know what the Bip things are, and I know what the elbow is, but what I don't get is the "you will want the elbow to be" part. What do you mean by "to be"? I assign the elbows to those parts?
Which leads to the next question; if I dont' separate it, and after I mark the seam and go to object and click it it selects the entire body. How do I mark out that I ONLY want the elbow? It doesn't seem to be working for me, and I can't figure out how to see all the way around the arm so its hard to tell if I've "marked the seam" properly.
3) now select the Right elbow and the Right forearm and assign them to the 'Bip 01 R forearm' bone just like how you assigned the body to the spine bone. When this part of the arm is highlighted select the spine bone and click remove (NOT DELETE) - remove remopves the arm's rigging to the bone (so it can move) delete removes the whole bone which you pretty much never want to do.
This is equally confusing, but hard to try out when I can't get through the first part. What I take this to mean is you want me to select both the elbow and the forearm, and then assign that to the 'Bip 01 R_Forearm', but how does this make sense if I just assigned the elbow to the forearm? Why don't I just skip part 2 and go straight to this? I am confused. And then you say "When this part of the arm," but it seems to me that I can't even select part of the arm, even when I try it. And in my file the arm is part of the torso, so I can't remove specific arms from the torso, thus can't remove them from the spine.
Now assign the upper arm bone For the elbow area and the bicep.
4) Next you need to move the arm into position to line up with te hand (and the bone)
Obviously I haven't gone to this part if I can't get past part two. Sorry to be a bother but this is really difficult for me to figure out for some reason, maybe since you are used to doing it you've forgotten a few minor things that may seem obvious to you that a total newbie wouldn't realize, I don't know but I THINK I've followed these instructions and I keep screwing up. Although this has happened a few times before, so its clearly an issue on my end.
Thanks for the help, and here is a picture of the "elbows" I made. Maybe this will help you figure out what I'm doing wrong.