Adding a velocity tool

Hi all -

 If I wanted to add a velocity tool to the project, what would be the best way to do that?  I see there's a struts.velocity.toolboxlocation set to "toolbox.xml" with no path, but there's no such file in the sources or in the generated WAR.   I'd like to use EscapeTool to fix all the places values are passed unescaped in JSON documents - there are many areas in the portal where things break if you type in an otherwise accepted " or { or \ character....