Critical Error: Application Ran out of Memory

[Lexing]

I'm having the same problem, and it seems to be worst when I try to log into a character currently positioned in a guild hall.

I would like to try this "force low mem mode" command but can someone explain more in detail how to add this to the eq2.ini file, and where to find this file in the first place? I don't like to go around editing files all willy-nilly in case I permanently change something I shouldn't.