Separate Route headers instead of comma separated values in a single header

Hi,

When I send a message thru the Jain-SIP stack, it is sending the route header 
like this

Route: <sip:abc>, <sip:xyz>

Is there a way I can force it to be separate headers like this:

Route: <sip:abc>
Route: <sip:xyz>

What is the easiest way to do it?