View single post in fixed width ?

[mindbuster]

I searched but didnt find anything on this.

How come when viewing single post that it expands to fill the whole window ?

How do i get it to be same width as my forums (using fixed width like here on vB.com) ?

Click here to see what i mean...

http://www.vbulletin.com/forum/showpost.php?p=841065&postcount=1

[Steve Machol]

That link opened up to the same window size as the rest of my browser windows. Keep in mind that the window size will be the same as the last window you opened.

[mindbuster]

But how could i have it to be same width as my forum ?
(The post itself, not the window)

Im having my forums at a width of 760 pixels, i would like that single post to be the same 760 pixels.
(Again the post itself, not the window)