After some finangling I got it to work. I needed to open the GRF and adjust the client version to 45, but that wasn't a big issue.
It looks like DEP was the biggest issue and would not let the Rag.exe work at all. It didn't give me even a notification of it not working.
Right now the client is usable. I'm able to work around Prontera, etc. I'll work on trying to make a "proper" clean KRO installation so I can mirror it down the road.
Auxillary's post in Client Won't Run was marked as the answer