I have been able to get my movie channels into Sunrise by a different method to the one listed.
I use IE6.
I go to the link
http://www.yourmovies.com.au/handheld/session_query.cfm
At this link my handheld page with my options are shown. I can add remove cinemas if I like at this page. If I try to use this page on Sunrise it doesn't work as it defaults to a new user and not my profile.
I have found, however, that if you select each cinema individually you can link them to Sunrise without any fuss using the new item wizard. This means each of my cinemas is a seperate document in Plucker but that isn't a concern for me. I put them all in a seperate category.
The only disadvantage is that I can get a listing of all the movies that are showing on their own just by cinema but this isn't a problem for me either.
Hope this helps someone.