N00b here. I am in need of assistance in modding character

[Cloud Fair21]

Noob here. I started modding a few weeks ago and I am so confused. I downloaded a Sephiroth texture with custom animations and a complete texture. Is there anyway to rename FitMarthMotionEtc.pac to FitMarthMotion01.pac? Because I still like playing as the original Marth and I don't want to have Sephi's animations for Marth. Need major help on this and I got a few more texture downloads like this and once I figure this out I can start making my own textures. Like I said I have had Brawl for about 4 years and I never thought you could mod this game and this community is amazing and I am so glad I found this place. I am sure you guys can help. Much appreciated. 

[Exorcist]

Is there anyway to rename FitMarthMotionEtc.pac to FitMarthMotion01.pac?

No. There can only be one custom moveset per character. If you still want to keep Marth, you'll have to sacrifice another character and port Sephiroth over that character. There are plenty Sephiroth or general Marth ports on the Vault that you can use.

[Cloud Fair21]

Alright. Thank you so much. I appreciate it.