I am missing a scu112.cab file to open excel. Our house burned down December and all my installation cd's were in the house. I don't have any cd's now, is there a way I can install this file to open excel files?

First its not a good idea to piggyback your question on someone else's. This can lead to confusion. You should start a new thread. So I've moved your question to its own thread.

You can contact Microsoft, if you registered Office, they will send replacement disks at a nominal fee.