[inebriate]

you have the right idea in the original post, but the value needs to match up with the variable you use in the included page

say in the included page the variable you want to use is called $blah, but the variable in the current page you want to pass is $asdf...you would then type {include file="theincludepage.tpl" blah=$asdf}


...unless you want to pass variables between php pages, then you would use x_session_register