Any GWX user who wants to use Stiebler's work should really get the GWX file under his name at this site. Second file from the top. Password, "Woelfe".
https://maikhaas.synology.me:5001/sharing/MtAJLwchp
It has all the file editing already done. Just put your patched (both Hsie and Stiebler) sh3.exe file in it, copy it to your mods folder and enable, and the Stiebler work is done for GWX.
You'll still need to do the actual patching in his "standard" patch folder. But as said, then just copy your patched sh3.exe into the GWX folder from the site above.
Another reminder of a common mistake made with the Hsie/Stiebler patch combo; if you're going to use the Stiebler patch, patch your sh3.exe first with the Hsie patch, but DO NOT use the options selector in his patch folder.
Copy your Hsie patched sh3.exe to Stiebler's patch folder, patch is with his patch, and then use the options selector in HIS folder to choose your options.