I've just been googling and reading and experimenting for about an hour, and haven't had any success.
Tesame seems to drop content such as cells or creatures from one of the two files in the process of merging. It will keep the cells of the first mod listed in the merge, but drop all the cells from the second. I don't know why, and it's a shame because it seems like the simplest way. But I had to rule out TESAME simply because it appears to malfunction.
With TES CS, the problem is that my mod references things in a another mod that I do not want to merge into it. If I use the "combine loaded plugins" option in TES CS, I will end up with my required clothing mod merged in. Conversely, if I load KN01 and KN02 without the clothing mod, merging and saving it without it will result in all the references being dropped, resulting in people walking around with invisible bodies and such. So, I had to rule out using the CS to merge my new resource file into the main Keening file.
I did not see a merge mod option in Enchanted Editor. "Google is your friend" - well, after reading a number of tutorials that did not answer my needs, I figured I should just ask.
Smartmerger looks nice, but all I could get out of it was a window that said please wait and a couple of blank documents.
How can I quickly and simply merge the data on the two esp files without having them drop any data or references? I would think this would be simple, but so far, no so much. I'm ready to learn... merging resources has been a very frustrating process for me all along and I'm sure it doesn't need to be. If it's a matter of just having to read more instructions, that's fine, but I don't know which utility to focus on yet.
Thanks in advance!