Synch 2 calendars to 1 outlook

I just realized that my default calendar is my yahoo account and all of the entries from that synch perfectly to my outlook calendar. DH uses my bb account to send me appointments that we both need to know about. These are NOT synching to my outlook at all. I don't have the typical problem that I've read where people are saying they have duplicate entries. I have 2 entries in my bb calendar and 2000+ in my yahoo. I'd like them all to synch with my outlook. Aside from backing up everything, wiping everything and then resynching to just my bb calendar, is there any other way to get both of my calendars to synch with outlook? (work is outlook xp where I am seeing this issue)

I did a search and most of the posts I found were people trying to synch 1 work calendar to outlook and a personal calendar to gmail or something. This isn't what I'm looking for. If I missed someone else answering this question I appologize. I really did look before posting.

Thanks for any advice or words of wisdom!

Doesn't anyone have anything on this topic?

Okay, it appears this is a PIA and has to be done manually if you follow the BB websites. SO, new idea. Is there a way to copy all of my yahoo calendar to my sprint calendar so that I can use that as my default? Right now my outlook calendar isn't synching w/ my BB at all because I tried to change my default calendar to sprint and then synch the outlook entries to the BB. When that didn't work and wanted to delete my outlook I hit cancel. Changed the calendar back to yahoo and now it skips the calendar when synching entirely. IUgh