[ic] How to set Shipping Address to point to current selected nickname?

[Interchange User]

I'm not using the "ship_addresses.html" provided in the IC demo 
4.8.5. Instead, I've written a form doing something similar (ie, 
load, save, delete) to handle multiple shipping addresses.

After I've selected an address, how do I make the current selection 
reflect on the Checkout page?  Eg, I have created new addresses with 
these nicknames:  new1, new2, new3  and I've selected "new2" and set 
it using:

[userdb function=set_shipping shipping="s_nickname address1 address2 
city state country zip"]

However, "new2" is not reflected as the current address at the 
Checkout page.  Instead, the previous default value was there.

What can I do to reflect the newly selected nickname's values 
instead?  I have a feeling it's got something to do with 
"mv_blob_pointer", but no luck after a few tries with setting it.