For the record, FF has been updated to v3.25 on my machine since then. Well, the best way to figure it out would be to give it a try. Please, be my guest
. I am pretty positive if you convert any of the 3 IPF's I mentioned to v3 HFE, it won't work. If you manage, the champagne is on me (with social distancing)!
Sometimes, modern times bring up strange issues, that sort of things wouldn't have happened in the good old days with a copy of either the Band or the Defjam / CSS version made through X-Copy, would it ?