Easy, you don't. If you had read the description, he had said that this is a brawl-Ex pack, which means that you have to have brawl-EX in order for this to work.
If I knew how to get brawl-Ex, I would tell you, but sadly, I don't.
What do you mean? Brawlex was already included in his pack.
Wiisam, do you mean that you're trying to use the characters in a non-Brawl-Ex build, and are just trying to figure out which characters they would be over? Because, if the Shd models are unchanged(Which is quite often; almost nobody changes them), you can preview those in BrawlBox to see which character. Also, sometimes people label the MDL0s something like "FitLink" or "FitSamus" and stuff, so you can tell by that, as well. Assuming that this is what you're trying to do.
Sorry I don't know what is non- Brawl-EX Build and yeah I forgot to check inside BrawlBox to find it's name. I havn't been doing hacking for long time so my memory is hazy right now.