Ladies and Gentlemen:

I have a question and I need your help. The question can be explained
in the following sequence:
a): I have an original file 1 which is read only;
b): Users open up my original file, modify it, save it as file 2 and
CLOSE it. Then whenever file 2 is re-openned, it should be openned as a
read only file;
c): Users open up file 2, modify it, save it as file 3 and CLOSE it.
Then whenever file 3 is re-openned, it should be openned as a read only
file;and so on!
In summary, I do NOT want users to over-write the existing saved files.
The only thing they can do is to open up any file they want, modify it,
save it as a different file. Once this is done and the file is closed,
they can not come back and modify it anymore unless they save it under
another different name!

Thank you so much for your help!

George