[cellarius]

Well, it's everything there, really.

In your own page, do something like this:
After "define('THIS_SCRIPT', 'test');", add

PHP Code:

$force_my_style = 5; 


where 5 needs to be replaced with the styleid of the style you want to use on that page.

Then create a plugin at global_bootstrap_init_start

PHP Code:

if ($force_my_style)
{
     $bootstrap->force_styleid($force_my_style)
} 


Not tested, should work.