Why is it that the crappy free Roady that XM gives out can memorize just favorite artists but the D3/XM combo cant?

 

I'd rather have 12 favorite artists (i think the roady does like 20 or 30) then have specific songs that are favorited. Especially when trying to catch some Dave Attell (since his stuff is impossible to find really really funny)

 

If theres a way to do it or a setting I'm missing, can someone let me know?