seriously, stare at the bag, ruck, and straps on the bag.
feed a7a straps looped once around the frame at the bottom, tie off with a knot at the top. have it so that the metal part (sorry late nite right now for me, whatever it is called) is at the top of the frame. easier to tighten, and less likely to snap your frame (as I learned the hard way) when having that metal part at the bottom of the frame.
now you got a 64 pattern bag right? stare at it, now stare some more. see the straps on the back? stare at them, place on frame, stare again. should be able to figure out the rest

it's a pretty simple concept really. I mean if I could figure it out on my own, I'm sure anyone could.
if you're using the 82 kidney pad, it's a bugger to get on unless you get an extra two inches sewn onto it.
though I personally was able to score one of them eryx missle padded carrier kidney straps. much better for the ironman (as I'm hoping to do my second one this year). might be a little harder for you to score one of them. but there's photography heavy duty belts out there that you can pick up for $80. I keep hearing you can get em at blacks. but anytime I asked about something like that, I got a blank stare *shrugs*
as for the 82 pattern strap/back pad thing. it's alrightish I suppose. I didn't like it because of the way it makes my upper back feel numb after a little while (ie hour three and you just want it to end) I picked up a seperate back pad and shoulder pad combo that the riggers made up for the jumpers when we bribe them. ask your unit mat tech if he could jimmy up something for you. or go and get ahold of riggermade on here. he's been making a bunch for people doing the ironman this year. anywho, mounting the 82 shoulder strap system, again stare. stare at straps, I'm sure you can figure it out. again blah blah, yeoman could blah blah, he can and he's stupid.