I do belive that dvd-r (got 10 at wal mart for $7) will work, and that it does not require the changing of booktype (as so many are having problems with that) Ill try it later an tell you if it works
I jsut noticed, if yuo wait long enough, the wiigator channel wii switch to a disc that sayd dvd-r I'm pretty sure that's evidence
:EDIT:
After 2 weeks of research, i learned that you can play with or without dvd-r's the link on the files and an explanation is:
link
NOTE: You need a newish computer, one before the year 2003 is very unrecommended, and on a windows 2000, don't imagine trying anything, to old to burn right.