It looks like you're new here. If you want to get involved, click one of these buttons!
It is rather easy, actually.
When you find the torrent which may contain the songs you want as a result of your initial search in FrostWire, simply click right on the plus (+) symbol in the torrent name.
A pop-up window should appear. If not, you did not click on the plus (+) symbol. Try again.
In that pop-up window will be a list of all songs and possible other items such as album artwork and booklet pages. Click on the box to the left of each song that you want to download.
If the list of songs are in the hundreds and you do not feel like searching through the entire list, type in the artist or song that you want in the search field at the top of the pop-up window to automatically narrow down the search.
Once you have selected the specific songs that you want, choose the appropriate button to download only the selected songs.
That should be it!