Ok, here's what we're running... MRTG w/RRDTOOL
14all GUI
My question is, does anyone know how to add (to 14all.cgi) "total [m/g]bytes transferred" for each target's graphs?

We don't HAVE to use 14all -- in fact, if you know of a way to get total bytes and 95th percentile working off RRD data, I'll give you a cookie! :)