How do I open a document in Evolution?

I have crossover office installed and can open MS Office files. The file in question is an excel file. When I click on an attachment, there are 3 choices: Save to Disk; View Inline; Open with External Viewer. I'd like to click on External View and have the attachment open in Excel. I've setup the External Viewer to open an .xls file with crossover office. I set the mime type up in Gnome Control Center, but I'm not sure if this will do what I want. If this makes sense, can I get a little help? Thanks! -- Tom Nielsen Neuro Logic Systems 805.389.5435 x18 www.neuro-logic.com