Double-Click conventions?
 

Installed Limewire about 10 minutes ago and discovered it's very perculiar behaviour

double-Click a file (.mp3) and it starts/plays - as it plays:
double-click another mp3 and nothing
double-click another mp3 and zippo
double-click another mp3 and nadda
double-click another mp3 and nothing

as it busted already?

ah no - there's a navigation bar hiding at the bottom of the screen and if'n i keep my hand steady i can click 'stop' - and 'now' i can run/play something else

that's a bit crappola isn't it?

my suggestion is to follow convention where double-clicking a different file aborts the existing file & restarts the new file but never 'ignore' a double-click

Enqueue
 

I've got a much better idea. Let double-clicking a fully downloaded music file add it to Media Player's or WinAmp's current playlist.
For MP this can be done programmatically through the WMPAddToPlaylistLauncher object or the WMPEnqueue verb.