Try StarDownloader (free) or IDA
I have installed every download manager I have found available and have come to the following conclusion:
Less Is More...
That is to say that programs like DAP, FLASHGET, REGET, GET, GOZILLA, etc. all offer a lot of cool features but at a hefty overhead--Taxing on the RAM. Not to mention the fact that even though I download a lot of things every day, I just don't want to have to struggle through the learning curve to max the potential of these programs. Sounds wimpy? Maybe....
I have found, however, that IDA (Internet Download Accellerator) works great, has a small footprint, nice interface, lots of features, easy-to-use, etc. It's only problem is that it tends to be a little too persistent on mass-downloads--as though it refuses to cancel them when you ask it to.
Lately, however, I have been using StarDownloader (free) and have had NO problems. It's such a simple, tiny little program that really makes things go much smoother/faster. The only problem is that it doesn't have USERNAME/Password passing. Maybe next update?
--Jase