I think right before you load the song (or in options) they should have all of these with check boxes next to them, and will temperarly add them to the song; sad thing is a lot of songs dont have people on them when you change the title (its not well known) or they dont put it in the right order (plus i have had to make a new folder, and add the new changed title songs there; zune keeps record of the songs i play, and changing the title screws things up). Just an idea
Edit:
Also another idea for [as-nogrey]; have somthing set up like the allgrey, where it is based on instead missing all of them, to hit all of them... your score will reflect off the % of all you get. final score will be multiplied by how much you completed (Ex: if i get 96% completion, my score will be multiplyed by ".96" (so it will go down, not added on, etc) And an option would be if you get 100% (which i have yet to even do on slower songs) make it multiply by 1.1 or somthing like that as a bonus of getting everysingle one.