I don't know if you already have info regarding items and equipment text so i'll just tell you what i've found.
Items/Key Items/equipment/card names are are located into the SLES/SLUS file in ff9 text format. Pointers for equipment and item names are right above the names, in blocks long 18 byes each, with the first two being the actual pointer. Key item pointers are located after the names instead, but not directly after (there are 386 bytes between the end of the block of the names and the first pointer to key item names in the italian SLES file) in blocks 7 bytes long, with the first two being the actual pointer. I'll try editing card names next so tell me if you need infos about them too. I hope to have saved you some time, keep up the good work!