use this tool: messageware activesend(www.messageware.com) to use OWA2007 or OWA2003 as the default email client
Messageware ActiveSend Personal makes it simple to e-mail Microsoft Office documents with a single click using your corporate Outlook Web Access web mail.
You can also use it to email links on web pages using your company’s webmail.
please note that your’s company’s network configuration can prevent this from working properly. Proper testing is required before deploying to production.