David,
A warm welcome to Beoworld and your first post.
The Beo5 does not have intelligents to do functions like searching as I think you have in mind and you cannot enter text as such
You could program it to go from artist to artist with one click or album to album with a click. You could even get very clever and program the volume control when controlling a 3rd party product to move through you album collection.
I guess the question is really what are you going to use the Lintronic converter to control ?