You are absolutely not alone. You should have seen what I had to go through to track down all the necessary information to make a working custom career, and that seems to be one of the more well-documented forms of mods.
Now since I haven't looked since Petz came out but when I last looked on how to do a career all I got were "this tut is no longer helpful due to the new SimPE & it's not going to be updated" ect ect. Maybe you'd be willing to help me out cause I still want to do it! hehe.
But on the whole, yes I agree it is hard to track down the needed information. It seems to be to scattered, it wasn't until recently that I fully figured out how to do the simple simple (I only say simple now cause I finally got it) re-coloring of objects. Damn that was hell to follow old tuts that didn't match the new SimPE. But I did it and I was damn happy to figure it out finally. Following two or three old tuts. I also managed not to ask any questions along the way! I'd now be willing to write a tut for it that goes along with the new SimPE. But where would I put it? I like the idea of a wiki thing, or maybe there could be a new forum only for tuts and such.
The thing about all of this is like others have stated some want it handed to them without having to read it fully. Or as Pescado said to many people come into topics they don't even know the basics about and clog up the post with questions not really related making the discussions dwindle to nothing. I personally love reading those discussions about programming or coding, even though I am usually lost the whole time, because I occasionally pick up a tid bit here and there but never add in anything. Although I am one of those who would rather try to figure it out myself given a real starting point, or at least a decent recent tut that actually explains the version of programs I have to use. Where as a lot of people are not like that and just ask and ask instead of trying to re-read or whatever!
Once I figure something out I am more than willing to try and write it out for others to try to learn from so I would actually be interested in helping the cause. However I fear that with new EP's and new versions of SimPE coming out people might lose interest in keeping up to date. And I also fear that since I do not understand SimPE that well I might not be able to update with it but I'd certainly try!
Oh and Pescado I have read on your "SimPE must be destroyed" thread and LOVE the idea of seperate programs(?) for seperate aspects of it. Such as a gameplay altercation, a re-coloring one, ect ect. Because there is a lot in there I will never want to touch or even look at so I'd like it if I could focus on just one section kind of like Bodyshop in a way.