It's all here in the archives on the forums and on the wiki. All of the documentation that was on Pluto's site was rolled into LMCE's site already. You have to dig it out if you want something, but honestly, a lot has changed since those days, it's almost like going to the local parts counter and getting a starter for your 2010 Dodge Ram and asking the clerk for a repair manual for a 1974 Dodge Ram. It's dated, some things in there are useful, but it's not going to help you understand the system any better.