on a Treo 600 ...

Anyone know how I can switch from using the default Palm contact app to Beyond Contacts from within the Phone application buttons?

I know I can launch BC itself by remapping the main buttons, but it would be nice to use the 'Contacts' choice from within the Phone app itself.

I couldn't find any info on the BC site, so I thought I'd try the gurus here. Any pointers appreciated.

Brian