In game portraits. And is riivolution difficult to use?
No, not really. It's what I use and I find it to be quite easy. However, the actual hacking of sounds is quite difficult and I don't know how to do it.
Also, by in-game portraits, do you mean "in-battle" portraits or select screen portraits?
Both. And would I have about 100+ hacks already in place on my SD card. Would I need to move them?
Check this tutorial for CSP hacking, as well as other helpful hints
http://forums.kc-mm.com/index.php?topic=12169.0As for battle portraits, you'll need to go to the resources section of the vault and go into the data partition file. Once there, go to the info folder, then the portrait folder and you'll see a large number of InfFace### files. Each of these files corresponds to a character color. Simply download the ones for the colors you want to have portraits for then replace the portraits in BrawlBox.
Also, you shouldn't have to remove all of you hacks to get Riivolution. You'll just have to get rid of Gecko and download the necessary Riivolution files. Again, go to the Riivolution tutorial in the tutorial boards for more info.