On your PC theres a program called "Character Map" (on XP its under Accessories/System tools in the start menu), it has all the possible characters you can make and thier corresponding codes. But I'll tell you, most fonts don;t support the extra characters so you'll likely get a placeholder box.
If you;ve ever played with Cpt. (Glorious)[][][][], ive seen his placeholders are musical notes, which I was able to see while playing a game, just not in the chat. I've never played with Razze, so Im not sure what his actually are, but its possible the in-game font supports it.