the latest black hands have a powershare option in them that you can set and aslong as ppl want that/those files they will always get first chance at a download slot and you can also download simultaniously
whereas in the older mods/clients to powershare you really needed to be only sharing those files and was unable to download as your partials would still be requested from other clients
....other mods do also have this option (i think)
but give TBH a go and see how ya get on
btw
V4=no community
V3b=community