This small extension should work in most CoreRPG layered rulesets and will allow you to open adventures and modules from other rulesets.
You will get varying degrees of success.
Things that will likely work are:
Reference Manual
Story
Images
NPC - Names and description only
Items - Names and description only
Encounters - partial

You will get plenty of things that dont work, plenty of things that partially work. This cant be helped as different game rulesets have different data structures.
If Ive missed (or misspelled) any rulesets let me know.
If you get errors on a type of data... dont complain to me or to SmiteWorks etc...

Current Ruleset tags that are included:

Over 100 rulesets supported.