I'm sure Jennifer did need years to collect all the music on her list.
It reminds me also to the years as I recorded
with a micro and a cassette recorder in front of the TV to get all the songs.
(Hey, I was about 8-12 at that time.)
I think I should buy an USB record-player,
I've got nearly 350 soundtrack LP's in my shelves,
and it's a damn long time ago I heard them.
(oh, that lovely scratches, and dust and and and...)
I used the software Magix Music Maker.
Here's an english version.
and some from the german amazon website
(I don't know how similar they are to the english / american software edition)
One version has also a keyboard, (I don't have this).
You need also some soundpool CD/DVD's there are a lot of music clips on it.
You can put clips together, but you can not generate a melody,
well, a keyboard could maybe help.
For MAC users, there is the "garage band".