I picked up the collector's edition of GC2... not too long after it came out, as I recall.
Earlier today, I got GC2 Ultimate Edition on Steam. (Yay sale.)
How do I enable the collector's edition content for GC2 Ultimate? I went to the page that the collector's edition flyer thing told me to, but when I ran the download from there, all it did is install the desktop - it didn't mention anything about the CE content.