a custom error message

[lejeczek]

hi users
I don't suppose this would be possible without hacking the 
code, right?
Reason I'm asking is simplicity and clearness in the message.
eg. is when an attempt to lock fails for file is already 
locked by other user
why bother users with the path to file on a remote resource? 
they usually only get confuse reading too many details

there is probably more cases where it would be great to have 
some ways to configure these error messages
thanks
P.