A little punctuation goes a long way lol
In the search window of Limewire you can see an icon column "?" . There is also a column for type. If you can't see it right click on the column header bar and tick "type" . This is more useful than the icon colum and will show which file type you are looking at.
You may need to open a file, once downloaded, by right clicking and selecting your player of choice, and then selecting this as your default player.
I hope this helps as I was not totaly clear what you meant in your question