Logos, and adding extra teams, no. But you can transfer rosters between ROMs like this:
Load two separate NOSE windows, then open your "source" ROM in one NOSE window and your "target" ROM in the other NOSE.
Then you can copy/paste (Ctrl+C, Ctrl+V) players between each window, from the player list tables.
I know it's not NHL98 but, UltraMagnus created an updated version of NHL95 that includes the 32 teams. It has season mode. Might be a nice solution for you until you have NHL98 figured out.