Add iCloud calendar to Outlook 2010 with IMAP settings?

Hi, I want to add my iCloud calendar to Outlook 2010 on my work's Windows laptop. It runs XP, so I can't use the iCloud bar - and that would add my contacts too, which I don't want.

I added iCloud via IMAP to my Outlook and can see my iCloud emails and notes.. But no calendar yet? How do I enable this?

Thanks

Update: at iCloud.com I shared my calendars to my work email address, where they were added in read-only format to my Outlook 2010.

I then added my usual colour coding for each one and selected them to all overlay, so I can now see when setting appointments if I have holidays etc booked. Great.