Project M 3.5 and custom announcer calls

[NXero]

I need help editing the 223.sawnd file from PM3.5. I know how to replace the files, but I ran into some problems...

On the first try, PM crashed. I soon noticed that Super Sawndz created a file twice the normal size of the original. Saving it a second time fixed it.
On the second test, it worked! ...or so I thought. Both Sonic and Mewtwo announcer calls got messed up somehow. I then deleted Geno's call, because it sounded horrible and...
The third time is the charm! Lucina sounds good! Sonic too! Mewtwo !... arggg! Now the annoucer says Mewtwo, but some random sfx got added at the end...

So my question is, do I need to insert a .wav that's smaller, lenghtwise, than the original I'm trying to replace? Or is there another way? Because Lucina call is .44 seconds longer than Marth. (Geno's was longer than ROB's too, and that time the last two calls on the list got messed up)

Also, if someone could do it for me it would be okay too, but I want to know how to solve this to avoid it in the future. Here's PM3.5' 223.sawnd and the Lucina.wav I'm trying to replace Marth's with. (I can't post links yet, so just replace the (dot)s)
www(dot)dropbox(dot)com/s/9yqk41eimjwk2cr/CharaCall.7z?dl=0

 

[NXero]

I managed to fix it by cutting both Lucina's and Mewtwo's announcer calls, but that's not an ideal solution, because I want to add Geno and Megaman. I wish someone else with more experience in sound editing could help me...

 

[Shane Lee Shin]

geno and megaman over who and who?

Edit: I got the weird SFX with Mewtwo as well. probably is a file size problem or a super sawndz problem

 

[NXero]

Megaman over Ness and Lucina over Marth because they already have semi-clones, (And Geno over ROB, because who likes ROB anyway). I'm gonna try different .wavs tommorrow, because I don't have time today...

 

[Shane Lee Shin]

yea i was pretty busy today. I'll see what I can work up in the morning

 

[Geno Boost]

you can play as Geno in PROJECT M???

 

[T-skjorte Ninja]

Well, no, and yes?The textures are there for those who are interested.

 

[NXero]

You can replace ROB with Geno using this:
http://forums.kc-mm.com/Gallery/BrawlView.php?Number=207888
There is a fitrobot.pac file for Project M in the download.

I inserted Megaman's character call and, this time, four character calls got messed up (Wolf, Snake, Sonic and Mewtwo)...
I'm thinking about giving up on this and replacing their announcer calls with an empty.wav