Many thanks to bathrobehero for your information details. I was trying to find information of all scrypt-janes coins too but it is hard to find. And I still don't know how to get the information of the N-factor for each coin itself.
Btw, according to your question Christian and maybe you have interest too bathrobehero. I personally think scrypt-janes development is very important for the future of GPU mining, but right now scrypt mining even with cudaminer is very profitable depends on the coins you mine. In the last 5 days I was able to earn 2BTC with total 5.5Mhs with cudaminer scrypt. That means roughly 0.4BTC per days with merely 5.5Mhs. If you compare with multipool, middlecoin, switchercoin & co, or coinwarz, coinchoose you know what I mean.

Thanks, I'm just trying to add to the project as much as I can, too bad I don't have much free time.
As cbuchner1 already mentioned, you can find the chain start time in the source code of the wallets (src/main.cpp) and you can work with that.
I just use an excel spreadsheet to add the increments and "convert" the timestamp to date format.
Tomorrow after work I might make yet another google spreadsheet but this time with all the N factor changing dates for all the coins we came across.
VelocityCoin and QQCoin have the same start time 1387769316 apparently. One party fucked up.

I almost forgot about those. I guess now I can safely remove the big "WTF" note I put next to them in my notes.