Just hacked together a Greasemonkey script that will add a button to select the content of a Code Snippet. Works in firefox with Greasemonkey, not tested in Chrome ( I think chrome has 'tampermonkey', right? ) or anywhere else.
http://dl.dropbox.com/u/69014538/TGC_CodeSnippets.user.js
I'll reproduce the code here, so you can test its functionality here within this thread:
// ==UserScript==
// @name TGC CodeSnippets
// @namespace idunno
// @description Add button to highlight code snippets for copying.
// @include *forum.thegamecreators.com*
// @version 0.1
// @grant none
// ==/UserScript==
var snippets = document.getElementsByClassName("CodeSnippet");
for (var i in snippets) {
var snipname = snippets[i].nextSibling.id;
if (document.selection && document.selection.createRange) {
var inlinescript = "var textRange = document.selection.createRange(); \
textRange.moveToElementText("+snipname+"); \
textRange.select(); \
";
} else if (document.createRange && window.getSelection) {
var inlinescript = "var range = document.createRange(); \
range.selectNode("+snipname+"); \
var selection = window.getSelection(); \
selection.removeAllRanges(); \
selection.addRange(range); \
";
}
snippets[i].innerHTML += " <a href='javascript: "+inlinescript+"'>select all</a>";
}
And another snippet just to make sure everything works (atleast it does for me, dunno about anyone else.

)
Blah blah copy this please!
Let me know if that helps/works and maybe someone more skilled in javascript can make a nicer script for this stuff
Edit: And attached a screenshot of what it
should look like.