My DSfW servers are badly out of date, still running OES2SP1. I'd like to upgrade to more modern version. As I understand, I cannot skip any interim versions but need to go through the entire path OES2SP1->OES2SP2->OES2SP3->OES11->OES11SP1.

So the first step is to upgrade to OES2SP2. Unfortunately, I can no longer find OES2SP2 documentation online anywhere which, understandably, makes preparing for the upgrade somewhat problematic. Maybe someone has the original OES2SP2 docs saved somewhere in PDF format and is willing to share?