I install BG to c:\BG
I copy the spell_rev folder to c:\BG
I open a command line, change directory to the BG installation dir and do weinstall spell_rev (cited your instruction here)
I get an error: weinstall is an unknown command
I switched to the referenced link:But there is no instruction for instlalling WeiDU on Windows. >> "For Windows and macOS players, WeiDU is included with mods. It’s not something you need to download yourself."
I tried to install WeiDU anyway via https://github.com/WeiDUorg/weidu/releases but there is no installation file, only executables
I tried to use the executables via command line, but without success - at this point I gave up and asked for help