Force Messaging to Save all Message to SD Card?

[gootdude]

Hey all, I have been using the built in messaging program with no problems so far. However, it only has an option for storing attachments to the SD Card, while the rest of the emails goto a folder in my BIS.
I tried searching through the registry to see if there was anything there that allowd changing the directory, but found nothing.

Has anyone found out how to save the messages straight to SD Card?
If not, does anyone have a recommendation for a good e-mail client that does this AND allows copies of all messages to be left on the server?

Thanks,
Gautam