To be honest I think you are better off getting DSL, as a friend of mine had Limewire on dial up and was lucky to get 3KB/s whilst downloading...She now has Broadband and it is alot better...
You could try configuring LW to achieve faster downloads, but in my opinion it would be a waste of time as you may gain a KB or two...
But this is only my opinion, others may offer some fixes...
