Has anyone been able to convert Pathfinder adventures to other systems?

Last December, I tried testing a roleplaying campaign for my brother. I had to stop partway through, because of some unresolved story issues, because of sickness, and because of the massive frustration of using an adventure designed for the Pathfinder system, which I don’t like, and don’t have the required supplements for, with the core rules for the Basic Roleplaying system, which I kinda like.

*headdesk*

I hope to restart sometime if and when I recover from this sickness. I hope to be able to get a bit farther with this adventure, though it’s not my preferred style of adventure, and try to run some other Pathfinder-conversion adventures which might be. I don’t know what to do though.

I think that trying to convert things from one detailed old-school-updated system to another detailed old-school-updated system has been more trouble than it’s worth.

I wrote up several pages of house rules and conversion rules and was always running into gaps.

I managed to convert over the non-player characters, but I have way too much trouble trying to convert over the accursed bestiary. I don’t have the required Pathfinder bestiaries, multiple volumes including third-party volumes, I can’t use the appropriate Pathfinder websites, and I have to convert everything before I can use anything.

I also ran into Basic Roleplaying rules issues. Like poison and healing and first aid.

I also had to deal with some campaign-specific rules, figuring them out, debugging them, clarifying them, and then converting them.