You'll need to explain your sprite troubles in a bit more detail before anyone can help you out really. Maybe a screenshot or two of your problem happening would help someone to help you out with your problem.
Here's my list of Final Fantasy 3/6 hacking links, if this helps you out any.
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http://www.masterzed.cavesofnarshe.com/ ZED's Unoriginal White Sheet
http://www.angelfire.com/al2/imzogelmo/patches.html NEPROMR
http://www.sharkgaming.web1000.com/sg3/ Shark Gaming 3
http://www.mnrogar.com/ Mnrogar's Den
http://www.rpglegion.com/ff6/index.htm RPG Legion-Final Fantasy VI Encyclopedia
http://homepage.mac.com/glennfield/magitek/index.html Magitek - Final Fantasy VI
http://www.tenchinohoukai.greatnow.com/ Collaps of Heaven and Earth
http://www14.brinkster.com/assassin17/ Assasin's Barren Webpage
http://www.tales-cless.org/ Phantasian Productions
http://members.aol.com/cklein0001/ cklein's Final Fantasy 3/6 Page
http://www.angelfire.com/pq/jumparound/ Lord J's ROM hacking FF SNES games page
http://www.cavesofnarshe.com/ Caves of Narshe and it's FF6 Message Board
http://www.geocities.com/the6thlime/animation/notes.htm The 6th Lime's Old Page
http://www.panicus.org/~the6thlime/ffvi/index.html The 6th Lime's New Page
http://jalchavware.no-ip.com/drakkhen/patches.html Drakkhan's Page
http://evilpeer.net/crypt/ Crypt of The Evil Peer
http://www.geocities.com/runelancer/news.xmlRunelancer's Site : Project: Rebirth
http://www.blitzkrieg.finalconquest.net/ BlitzKrieg Innovations
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