[X4U] Acrobat loading in Safari

[Steve Self]

So I now have Acrobat 7.0 loading into Safari to display PDFs from  
the net. And the prefs for changing this in Acrobat are grayed out.  
Anyone know how to get rid of this annoying setting. I like having  
Acrobat around for some heavy pdf lifting, otherwise I want to use  
the native PDF viewing within Safari and use Preview - they both load  
much faster than Acrobat.

So how do I set up Safari to view PDFs natively?

Steve