Enterprise Search Question

I didn't know where to post this question, since I can't find a
Search-specific newsgroup. If this should be posted to another group, please
let me know.

I am looking at the Enterprise Search Server Express solution to index my
Windows file server and Exchange 2003 public folders. I am also looking at
the new Desktop Search 4.0. Can anyone tell me if these two solutions will
work together? In other words, can Desktop Search be pointed to the
Enterprise Search's catalog? Any thoughts on these to products would be
appreciated.

Thanks,
Joe