So I've tried converting some add-on peds and vanilla peds to streamed peds using this method for Franklin, but I've noticed weird issues with Franklin's entire body where it would spaz out when replaced with certain peds. For example, replacing Franklin with strippers/hookers will straight up turn him into a frankenstein monster where the entire body glitches out. Yet, if I replace Michael with strippers/hookers, it will work perfectly. Not sure why this occurs but in general, there seems to be glitchy issues when trying to replace Franklin.
Edit: This method of swapping non-streamed peds to streamed peds also does not convert any have physics or facial animations, in case anyone is wondering.