@zomg, there is no way to add permanent hit directly to any of your items aside from enemy weapons.
@Stargazer, That is very easily done.
Refer to this site for character class values:
I am assuming that you have Roro22's cheat table (one that I posted a page or two back) downloaded and are using it. If you do not, then look through the previous pages for a link entitled V2_PSOBB.
First, go to the character selection screen of the login process. Next, open up Roro's cheat table and browse the memory region of your name string (the first entry of the cheat table). Scroll up about 5 lines or so. If you have a controller plugged in, or are just quick, switch from one of your characters to the next. There will be two values like 0a 09 right next to each other that change when you switch characters. The first value is your section ID and the second is your character class. Now, to permanently change your class, you will have to take the character that you want to change and go into the dressing room. Once there, using the character class offset, change the value to whatever class you want and then accept the changes. Your character will now be whatever class you chose!
A note: if you have mat usage for the previous class, you will have to use that configuration with your new character (unless someone knows how to reset the mats your characters has used aside from giving Crono money).
If you need pictures or a video on how to do this, I can provide either (pictures are easier for me and my **** cpu).