The edits themselves are very good--are these mockups or actually hacked into the ROM already? Either way they're impressive. I just can't help but feel that having them in their native resolution as well as being in .PNG would give us a crystal clear representation of your work, though. Every artist deserves to be properly represented! 
Thanks

They're not mockups. I hacked into the graphics and made the changes.
Right now I've done every area up to Cosmo Canyon, I still have to go back and touch up some areas.
I'll post some pics in full size, is there a way to take snapshots using FCEUX? That's the only emulator that I have save states for.
I'll make the changes to Aerith's sprite. Aerith's battle sprite has been bothering me too. I want to change
her dress colors, but then Cloud, Tifa, Cid, and the colors on the top part of Cait Sith will change too. It would be
nice to make the bottom part of her use the Red, White, and peach colors that her head uses
rather than the blue, yellow, and peach, then I could at least give her a red dress.