[non vb]:php templates help

[weirdpixels]

Can anyone help me with php templates. I am a total newbie with php.

What i am trying to do is, once a link is clicked it will load the content onto the page using templates. e.g. the link could be www.domainname.com/link?=test.

This would then load the content that is in the test file on to the main template in the middle area. Right now i have something like this. The old problem is it loads the new content on top of the old. I take it i have to just have blank template for it to use, so there is no content in the middle?

Also how do i sent the area of which it displays the content at?

I would be greatfull for any sort of help

Thanks