Hi Michael,
Thanks for the reply.
I saw a similar comment on the Napster discussion board. they said that you must fist burn to a CD and then rip it off as MP3 or ACC (back to the original computer?) before the song can be transferred in to iTunes. I have copied the songs to a memory stick, but apparently that doesn't give me the ability to "rip it" as MP3 or ACC.
In addition, Jeff's comment above mentions protection. I've paid for these songs, but the properties of the song files say the are "protected WMA". I don't know if this means I can't move them.