I've seen people KGB versions of Microsoft Office to small sizes as small as *.4 MB, and you can download them without having to use torrents. The downside is that it takes hours to un-KGB them. But hey, according to the time-space memory tradeoff rule, you don't get something for nothing
Gridlock's torrent idea isn't bad, but sometimes (especially if your at a company setting) firewalls can slow down BitTorrent and other torrent clients to a crawl, making downloading torrents unbearable.
"Workers of the world unite; you have nothing to lose but your chains." -Karl Marx