Are you saying that you want the other calendar to display on your folder
list, so you don't have to select File, Open each time?
If so, in Outlook XP, Select Tools, Email Accounts. View or Change Existing
Email Accounts. Click Change, then click More Settings. Click Advanced.
You should now be at the "Open These Additional Mailboxes" dialog box. Click
Add. Type the name of the mailbox you want to open, then click Apply, OK,
Next, etc. to exit all dialog boxes.
Now when you open Outloo, this calendar will display in your Folder List.
Apologies if this is not what you want..