Okay, I am working on a mod that uses several items from the KotN and Spell Tomes DLC, I've got them where I want them, but when I launch the game to check it out, the items are not there! Does anybody know what to do?

The most common reasons for this are:

• The esp isn't activated.
  
• The item is placed outside the town in the town's worldspace instead of the Tamriel wordspace.
  
• Your using Windows 7 or Vista and Oblivion is installed in the Progam Files or Program Files (x86) directory - UAC tends to make a mess of mods.

Check if it's one of these.

It sounds like you're trying to put items from two different .ESPs into a third .ESP. The CS won't do that. You may want to look into http://cs.elderscrolls.com/constwiki/index.php/De-Isolation_Tutorial. You may also want to look into the http://tesnexus.com/downloads/file.php?id=36370.