Regarding you question on season-signs I'd say that with GEM you select the different mod (via its specific .exe) and if the track is multi-season-capable, it will automatically pick the correct season-files. Thats why you not only need to install the nurburg.3do (for 1967), but also their derivatives like nurburg.365, nurburg.366 and nurburg.369.
And many thanks for putting me on the credit-list. It's a great honour to be there on a list with all these famous names of GPL from 1998 onwards.
Edited by GORDON_S, Jul 22 2012 - 05:36 PM.