Using IFS to Build a CIFS proxy??

Can I use IFS to build a CIFS proxy on a Windows 2003 server?

The basic idea is to intercept file i/o calls between the client and the
server without installing anything either on the client or the server. A
separate Windows server re-exports
shares exported by remote NAS servers.

As an example, a file \NAS\Y\x.txt on a NAs server is re-exported by the
Proxy server, Proxy, as \Proxy\Y\x.txt.

This is somewhat like DFS except that I want to intercept more i/o calls
than just the name lookups.

Is it possible develop a proxy IFS driver on a Win2003 server to redirect
all incoming calls
to an exported share to a remote NAS server?
Any help would be greatly appreciated.