Garrysmod Usermessage settings?

Is there a way to edit the settings for usemessages? Setting the Size Limit Etc…

AFAIK that’s unchangeable, and there is no options for usermessages at all.
However, there is umsg debugger:

http://code.google.com/p/saitohud/ (last update was ~year ago)
svn http://saitohud.googlecode.com/svn/trunk/src/SaitoHUD/

p.s.

Thanks