Hi NonagonGoron,
The texts you are looking for are very easy to change, but Cebix tools are not easy to use as they work on command line only. First you need to install Python on your PC (I guess you have done that already).
Then download this pack:
https://drive.google.com/open?id=1Zl1cNjjWEKJ-Z6HaYPeuHs8UCrARdNRrIt has everything you need except the ISO files. I recommend you to use the correct ISO files which are:
Disc 1 (SCUS-94163): 747.435.024 bytes
CRC-32: 1459cbef
Disc 2 (SCUS-94164): 732.657.408 bytes
CRC-32: a997a8cc
Disc 3 (SCUS-94165): 659.561.952 bytes
CRC-32: 1c27b277
That way everyone will be using the original game data to apply your patch. Once you have these ISO files, put them in the "iso" folder and rename the files to match this format (CUE files are mandatory):
FF7-1.bin
FF7-1.cue
FF7-2.bin
FF7-2.cue
FF7-3.bin
FF7-3.cue
After that, double-click the file "
0-psxrip.bat". This will extract the contents of the ISO files.
Next step: double-click the file "
1-un-trans.bat". This will extract all the texts into the "txt" folder.
Then open the "txt" folder and modify whatever you want. The texts you are looking for are located in the "battle" subfolder.
When you are done, double-click the file "
2-trans.bat". This will insert the txt files into the ISO files.
Finally double-click the file "
3-psxbuild+fixup.bat" to create the new ISO files.
I think that's all.