SiFR takes the ASCII text on the page as it's source. AFAIK, there wouldn't be a practical way to specify the ligatures in that manner.

Now, perhaps this is an OpenType issue that Flash may or may not have support built in for...that'd be a question that one of the OpenType experts would have to address...

I believe sIFR supports UTF-8-encoded Unicode, so it should work.

Flash does not support OpenType advanced typographic features (ligature substitutions) at all.

Basic ligatures (ff fi fl ffi ffl) have their own Unicode entries, but less conventional ligatures are either mapped to the PUA or left unencoded.

In practice, this means:

1. Flash can not use unencoded glyphs.
2. It can use PUA-mapped glyphs (I think), but the original HTML page would render unreadable without the sIFR intervention.

-- omine.net

yes, its a delayed answer. but still: http://wiki.novemberborn.net/sifr3/Tricks