Lets see.
Simplest way to do things sweeping wise is to start out at an excessively painful pace and work up some speed and accuracy. As you hit each note from the 5th or 6th string to the 1st be sure to roll your hand accordingly from the wrist to get a nice even motion going or at the very least a comfortable motion. A nice fluid sound will come from accuracy, comfort and this last bit about muting techniques.
Muting the strings is an art and takes some getting used to. With your fretting hand you will want to make sure that you don't lift your fingers from the strings too much after playing each note. The idea is to bring your fingers up just enough to mute each succeding note before you strike the next note in the arpeggio or pattern you are sweeping.
The picking hand can be used to palm mute lightly or heavily the strings you do not pick during the arpeggios being sweeped, whcih works best on the lower strings when playing the higher strings. Conversely you can use your fingers on the higher strings to mute those if you wish when playing arpeggios on the lower strings. There are some interesting techniques out there. Experiement and figure out which ones come naturally and if those don't do it keep trying new and interesting combinations.
good luck with the sweeping.
[Edited by Seiko_Hejiro on 01-27-2004 at 09:23 PM]