I have a DSL modem, which of course allows me to download at high speed. I like Flightsim.com's file searches much better than AVSIM's, but that causes a slight problem. Flightsim.com is VERY slow to download, while AVSIM is very fast. What takes about 5 full minutes, or more, to download from Flightsim.com takes only a few seconds on AVSIM, with a DSL modem.
What I have been doing, and it really helps a lot, is to go into Flightsim.com and search for whatever I am looking for. If I find anything, I then open a second window and go into AVSIM and do the download from there, if AVSIM has it. In other words, I'm in both at the same time.
Doing things this way saves me loads of download time. I just hope I'm passing along a tip and not somehow cheating by doing it this way.