What does this enhancement do?
Give users the ability to post code in tickets, whether it be in the ticket post or reply. The system would then be recognised as being a block of code, and apply appropriate CSS on page load. In other words, syntax highlighting. I'd suggest prettify: http://code.google.com/p/google-code-prettify/, StackOverflow.com uses it.
[code]$test = 'This is a test'; echo $test; // display the message... echo 'It's alive!'; [/code]