Quick Queston.

[sillybuttons™]

I'm finally playing through FFVII for the first time (I know, what am I playing at?) Anyhoo. Im at the GI caves and need to know if I've missed something for good or if I can still go back and get it. It's the Mythril Item that you get from the guy in the cave. I have just found out that I would have got it if I had have done a certain amount of battles. I believe this item is for Aeris' best limit break and really dont want to miss it. Can I get it at a later point or do I need to go back to a previous save? I'm using multiple saves and have one not long before I went to the cave but Ive done so much since then like maxing out a fair few materia and got beta for 3 of my enemy skill materias so I really dont want to have to go back this far, but if needs must.......:mog:

Edit: Oh and another question. Has anyone got a good link to somewhere I can get the instructions for the game from (for PC). I'm having a bit trouble working out how some of the materia works. I dont want a list of combinations (not gonna cheat my first time round) just an explanation of all the individual materia. Thanks.