I read in russian forum about requirements:
about ignition:
knock retart table (same resolution and bins as advance table)
knock noise scale and threshold vs map table
more flexible configuration for dual knock sensor operation (to choice sensors sequience to using, etc 1-2-2-1-1-2-1-2)
autotune retard table from knock data on high map
about bi-fuel:
propan and gasoline injectors has +batt connection to relays, relays switched by P259, fuel selection by the same input as antilag. Separate VE,La,ign tables for each fuel.
My page in Russian http://rus.vems.hu/punbb/index.php