Find replace in XML Document

Hi all,

Following is my XML

< Import>
   <File FileValue="00000A96.dat" ></File> 
   <File FileValue="00000A98.dat" ></File>
   <File FileValue="00000AA4.dat" ></File>
   <File FileValue="00000AA5.dat" ></File>
   <File FileValue="00000AAA.dat" ></File>
 </Import>

When I searched multiple text like "00000A96.dat" and "00000AAA.dat" and by the result both Element should me removed.

And note: my XML file is around 200+MB in size how to process this?

Thanks Vivek SharePoint Foundation 2010 Book
http://www.redpipit.com