Tailor colum_right for a specific page

[letmelearn]

I'd like to tailor column right for a specific page. If newpage.php is active then only show new infobox on the right.

I'm thinking I need to do something like this:
if (substr(basename($PHP_SELF), 0, != 'AAAnewpage') {
include(DIR_WS_BOXES . 'newpage.php');
}

but I'm not sure if this is right. If this is right what do I put instead of AAAnewpage?

thanks for any help you can give.

LML