At least for serials put them in a text-file right next to the installer on the hotline server.
that is what we normally only do for stuff where its SN is not in SS, which should be the first place where to look.
otherwise our SN textfiles even wear custom icons so that you can tell their source if in doubt.

and in opposite to the old forums the HL server actually has the latest SS database. just saying. discussions about those matters are useless anway, i rather get actual work done.
