How Do I Use Fighter Factory 3 X 64 + My M.U.G.E.N. Character Ideas

I really want to get into creating characters to M.U.G.E.N., and I know you have to use Fighter Factory, and I do have it, but I don't know how to use it. Also if I do create characters, these are the ideas I have in my head right now

M.U.G.E.N Character Ideas

• Chuggaaconroy [YouTube]
• That Chocolate Guy [SpongeBob SquarePants]
• Shane [The Upside-Down Show]
• David [The Upside-Down Show]
• Chef [South Park]
• Cleveland Brown [The Cleveland Show]
• PeanutButterGamer [YouTube]