Dude, the best download manager is FDM, also known as Free Download Manager. I used to have DAP when it used to be good, but now it seems kind of shady, even though it's not supposed to have any spyware/adware. Get Flashgot for FF and it will be sweet downloading from then on!
I was afraid of that one thats why i downloaded this one keeps my dl very steady in speed i was dling at 19 kb with FF now with this oen stayed 62-68 steady http://www.internetdownloadmanager.com/