Hmm, no, there isn't really anything you could use to speed it up in that sense, though you can download Download Accelerators which are meant to speed up connections in a way of downloading 4 parts (or something) of the file, seperately. They also very often have a pause button to come back to it later too.
I wouldn't expect massive improvement, or even any at the most of times, though I gues one is worth a go. Be careful which ones you go for though, since some could cause corrupted downloads since they split the file up to download in parts and then put these back together again.
'Download Accelerator' is meant to be a good one:
The free version does contain some spyware though, but only to keep it free. I woudln't be sure if wiping them would stop the program from working for instance (not harmful or anything, just sponsors, like pop ups on the program i'd think (i've had it before))
But the version you'd have to pay for, wouldn't have any at all (not sure if I can asume this the best option)
I hope this helps