GRF settings for old saves
From #openttdcoop wiki
= GRF Settings
==from beginning until SB-Game #15 and Werkloze Desyncs, Inc. on MS
[newgrf] planesetw_459.grf dbsetxlw.grf alpinew.grf pb_hovs_bus.grf pb_viaduct.grf basic_platformsw.grf harbourw_456.grf jcindstaw.grf newstatsw.grf pgs-counw.grf pgs-freiw.grf pgs-silvw.grf pgs-subuw.grf ukwaypointsw.grf
== after that until revision r8620
[newgrf] planesetw_459.grf alpinew.grf pb_hovs_bus.grf pb_viaduct.grf pb_ukrs.grf = 0 3 0 troprs_w.grf basic_platformsw.grf harbourw_456.grf jcindstaw.grf newstatsw.grf pgs-counw.grf pgs-freiw.grf pgs-silvw.grf pgs-subuw.grf ukwaypointsw.grf usstatsw.grf
From revision r8979, the GRF settings will be set automatically and are stored in the saves.