The MMO/ineisis src is off cause easier as you have it mostly done for you, but it's not required.

"how hard is it to add NPC questing to the worlds?"
I think you have to program your own NPC AI, it wouldn't to hard with the way point system.

Also, here's a tip I found useful, bookmark the 'View Today's Posts' on the top right.
I couldn't figure out what people were talking about because of all the different sections.

Alright the info you guys provided has been really helpful! I understand the basics, and watched some video's of how to implent the MMO source code. One thing: The blood massacre source seems kind of different then MMO source files in Fuzzylr's video, how do I add the Bloody Massacre up properly? Thanks!

V2, extract the hash coded folder to your projects folder.
v1, anyway

Tried adding up the project to the project folder in 2.0, found the project on startup as 'Bloody massacre' -> white screen, blank project. Not even bothering 2.0, I think I prefer the old-fashioned way. What do you mean with 'anyway', cuz I'm clueless

sorry meant anywhere, I don't know if v1 of BM is still available.
BM v2 works fine, it's strange that you have no project files in the BM project?
where is your Esenthel 2.0 folder? best to put it on C:\
It should just work with v2.

BM v1 has it's own editor, you'll need to use that to modify the world, obj. etc.

Yeah I got it on my C, yet no effect, I reinstalled but still the same issue. Like, it doesn't show anything on the upper left side.

Screenshot? Or even better, recorded the problem and uploaded it to youtube.