I will dig out the notes for cisco routers and post or would u prefer email ?

I am located Uk and work for NHS + U ??

Thanks in advance

Yes, you would probably have to change the Mask as well as maybe the gateway as well at least on some systems, and checking to see about leaving other alone.

Wow can't believe anyone is trying to still use Static IP on that many clients. That is a admin nightmare

Xmine, you really should go with DHCP either built-in or something like QIP

Once up and running it should releive you of many headaches.