This package contains:

• Documentation of all Dark Engine font types, SS2 vanilla fonts, shock.cfg font entries, and precise ThiefFon syntax for converting Dark Engine fonts from FON to BMP and back.
• All font files used by SS2.
• Version 1.2 of ThiefFon (and several other font-related tools).

Hopefully this will clear up all the difficulties with editing SS2 fonts.

For additional resources see this thread: SS1+SS2 Font conversion tools