Can I connect 2 trunks using only Realtime contexts?

Hi everybody,
I’m currently using Asterisk 1.4.2 and I would like to connect two trunks using only Realtime contexts, but I wasn’t able to find any documentation on how to do that.
Currently, if a call comes in from one trunk, it gets forwarded into the configured context. That has to be set up in the extensions.conf file or a Realtime Static database and switched to the real realtime dial plan, where I Dial() the second trunk, using the ‘switch =>’ syntax.
I would like to be able to send the call directly into the realtime context, as currently, when I create a new trunk, I have to reload asterisk, which is a inconvenience and it beats the general purpose of my realtime dial plan.
Is it possible?
Thank you for your reply in advance.