Custom static PHP page to use WordPress functions (but not loop)

Hi, i have a very simple forms page here:

http://www.unifiedmicrosystems.com/forms/uc.php

The above URL and page will not show any information from WordPress and doesnt even need a wp_loop function.

I would like to include this in the WordPress framework so that i can call in CSS styles for use on the page, for instance

return get_bloginfo(‘template_url’) . ‘/theme.css’;

However the above doesnt work becuase it doesnt know what get_bloginfo() is, and if i include WordPress inc files it gets very confusing very quickly.

What is the best way to go about this? Am i forced to make a custom page type for each page (would be a pain as the feedback form uses custom PHP) or is there a simple way to get access to the WordPress framework to use some of the simple functions?

Hope this makes sense!

Many thanks in advance