Long PGN is accepted in all chess databases. You can verify this by
copying and pasting the below into ChessBase, for instance.
1.Pe2-e4 Pe7-e5
2.Ng1-f3 Nb8-c6
In an expanded PGN on can have additional header tags which can turn off
castling and e.p.
[CASTLING 0] would mean turn off castling. Castle-on is default.
I find it inexplicable that so few people think it worthwhile with a chess
variant PGN viewer for HTML. Such viewers are used everywhere on the net
for Fide-chess. It would greatly enhance the analytic aspect, since people
are almost only involved in inventing variants. With a viewer, they can
begin to analyse them. This is also the first step to a chess variants
database.
/Mats