Riivolution already does what either of those did for you.  You will still need the Stage Roster Expansion code, but do NOT use the File Patch/Replacement codes.  Are you using BeyondYou's Riivolution or did you download it from the official site?  If you're using BeyondYou's (which can be found here in the Vault) then I can help you.

The easiest way to get apps is to download the Homebrew Browser and download them from there.  If you can't do this for some reason then you need to have the gecko app in your apps folder.  If it's in the right place it should show up when you go to the homebrew channel.

You name them what you want them to go over...

Mario
00-Original
02-Green
03-Blue
04-Wario/Yellow
05-Black
06-Fire Mario/White

Mario doesn't have a 01 outfit.

When you loop it make sure your loop points are divisible by 14336. If not BrawlBox will loop it forcefully and mess up your .Brstm, unless you just want it to play all the way through and loop back to the very beginning, but I don't think that sounds as good.

   I just realized you're using Riivolution!  Get rid of that .gct!  Unless you're using BeyondYou's Riivo? You'll need a .xml for Riivo to work properly.  Also do NOT use the File Patch Code or the Replacement code with Riivo.

The music name is changed?  You must have a tampered with common5.pac (I think that's where it's at).  Get a fresh one.  If it's in common3.pac get a fresh one of that as well just in case.

Each line of code has 16 digits.  If you delete every space it should have worked.  You either deleted a digit by accident or you didn't delete a space somewhere along the line.  The longer the code, the easier you can mess up.

Go here: http://forums.kc-mm.com/index.php?topic=19915.0

You're making .Brstm files?  Just make it louder in a program such as Audacity.  Open it up in said program and you'll find the decibels on the left side of the imported file.  You'll have to do this before you convert it to .Brstm tho.

Look here: http://brawlhacks.wikia.com/wiki/The_File_Placing_and_Naming_Guide

Nope. No spaces whatsoever.

Marth over ROB has already been done!

http://forums.kc-mm.com/Gallery/BrawlView.php#Type=Character%R.O.B.%

Go Here: http://www.smashboards.com/showthread.php?t=290659

If that .gct has the File Patch Code 3.5.1 in it you shouldn't need this, but just in case:

Disable Custom Stages:

046B841C 48000040

Well one thing I notice is that your .brstm is named incorrectly.

http://brawlhacks.wikia.com/wiki/The_File_Placing_and_Naming_Guide

Also do you have the disable custom stages code?  If not you will more than likely need that.

There have to be absolutely no spaces in your code.