Event Hacking question

The event field is for an offset; it has nothing to do with event bits. You said you changed his event to 1E8B4. Remember that these are all relative to bank CA, so to find the event it's pointing to, you would add 1E8B4 to CA/0000:

CA0000 + 1E8B4 = CBE8B4

You can do hexadecimal arithmetic fairly easily in Windows calculator, if you're using Vista or later.

So to in actuality i'm looking for the event 11B4E (CB/1B4E -CA000), correct? Its the event just prior to the coin flip scene where Setzer puts Celes in the room and says he'll come back later. This should make Umaro visible because the event is already defined by previous coding, correct?

EDIT- well 11B4E displays umaro still, but when I talk to him it awkwardly goes through the previous scene. Once that's completed, I am back at the "empires made me a rich man scene." So not it either.

Now, to have Umaro saying something unintelligible, you would need to write your own event for it. The captions already exist for this sort of thing, so all you'd need to do is write a caption call event. You can find many, many examples of this in the event dump.

by a caption call are you referring to 'display dialogue'? or something else entirely.

Heres the all the hex work I have done:
In CA/AE2E (AB02E):
D0 00 C0 27 01 1C 1E 01

In CB/2221 (B2421):
Inserted - B2 30 02 27
Overwrote - 94 5A 08 5C (what was overwritten) ********

In F1/0230 (310430):
Inserted: 94 5A 08 5C (the stuff I overwrote) *********
Inserted: D0 7E D4 ED D4 FD D1 00 FE

In level editor:
On NPC 19 (umaro)
X,Y: 9,8
Event: 1E8B4
'If Mem Set'
Address: 1E80
Bit: 0

What I have overwritten is by the *******

At a glance I don't see anything wrong with that. Your game is crashing well before that, though, so you may have inadvertently changed something at a different address.

If you can't revert it back to normal (by comparing it with an unmodified ROM), your best bet may be to continue your work on a fresh ROM.

I may have to try on a fresh rom to see if that solves the crashing. How can you tell that the game is crashing before hand already?