I dont understand your numbers, but technically the following could increase overall speed if individual computers are throttled out of your building (rare).

FIre up 5 computers on limewire, all downloading the same thing.
Set up a 6th computer, manually set the hosts to be the ip address of the other computers you have set up, allow partially download file sharing on all boxes, theoretically the 6th box will download from the partially downloading other computers, meaning you get a bit of a shotgun hit from 5 throttled boxes with a potential increase in speed on the 6th box.

This is only theoretical, and if it works is only likely to be a minor increase in speed, its not like you have to sit and watch the download occuring, you could try something novel, like wandering off and doing some "work" for a few hours and leave the downloading to its own devices!