Well I am a noobie too, but this is the way I did it. I got my N800 last week and tried to install Kagu and was missing some of those files too. So I tried to install GAIM, and whatever I did enabled the missing kagu files. I'm sure I did extra steps, but this worked for me.
I only had the default catalogs so I had to add 2 new ones.
1. from the side bar go to Tools -> Application Manager
2. then from the pull down menu at the top go to Tools -> Application Catalog
sorry about the link....the good thing is...is that it was a link to another thread on this forum. Someone posted a link to download the files. I downloaded them.....and now Kagu is working!!