You will need to get ficedula.dll and LGP Tools, which you can download from that same page. You'll need to put the .ffpatch file in your battle folder in the data folder found in your ff7 directory folders. You may want to copy the battle.lgp in that folder, and put the copy somewhere else in case this one being patched gets unusable. Then make sure ficedula.dll is in the same folder as lgptools.exe. Then run lgp tools. Then go to tools/patches/apply patch, and find and then click on the .ffpatch file you downloaded and press ok, and it should start applying the patch.