[kh99]

You should be able to create a plugin using hook cache_templates. You might want to put an 'if' around it so it doesn't get cached when it's not used, like:

if (THIS_SCRIPT == 'something')
{
    $cache[] = 'your_template';  
}

but I suppose it's better to cache it on every page than to not have it cached when it's used, so if you're not sure about it, just leave out the if.