Using winxp pro and msoffice 2003

I am using this code to open a workbook and it does the job I am asking it
to do alright, only what I really want to do is open a copy of this workbook,
and set the read only attribute to false.
I tried putting this at the end of the statement ;read only = false but that
doesn't work.

Workbooks.Open ("C:\Documents and Settings\joanne\Desktop\ _
Linking Project\Outlook Master Pricing.xls")

Could someone please show me the proper syntax for opening a wb as a 'copy
of wb' and setting the read only attribute to false?

Thank you for your help