Redirect To New Site Address

Hello,

I apologise in advance for my ignorance. My question relates to Windows Server 2008 R2 Standard and IIS 7.5. I have an web application that uses the site "http://CASD01/CAisd/pdmweb.exe" on our local intranet.

I wish for anyone who navigates to the address "http://SDM01/CAisd/pdmweb.exe" to be re-directed to "http://CASD01/CAisd/pdmweb.exe" within our internal network.

To add to this I want any subfolder to be re-directed too for instance if someone clicks a link to

 http://SDM01/CAisd/pdmweb.exe?OP=SEARCH+FACTORY=cr+SKIPLIST=1+QBE.EQ.ref_num=99

I want them to be re-directed to:

http://CASD01/CAisd/pdmweb.exe?OP=SEARCH+FACTORY=cr+SKIPLIST=1+QBE.EQ.ref_num=99

So basically I need SDM01 to be replaced with CASD01.

Any ideas?

Thanks

Stuart