If you want to test multi-sourcing, the best test is to download a file that most have!
Install Shareaza Pre-Compiled Settings Version (made by Jimbo) from
http://tassyp2p.tripod.com/
Once installed, setup your profile.
then PASTE the below into >TOOLS>DOWNLOAD URL
magnet:?xt=urn:bitprint:WIXYJFVJMIWNMUWPRPBGUTODIV52RMJA.CN25MLNU3XNN7IHKZMNOA63XG6SKDJ2W7Z3HONA&dn=Shareaza1820.exe
And watch the SPEED Transfer HAPPEN <F3> or Graph <F10>
The file is small so you might not see the ultimate speed but you should get enough time to see multi sourcing in action. You should expect greater than 20Kbytes per sec. You will get the file as fast as slots are available.
You now have the new patch to update the client.
.