Nokia IP530 using MicroDrive or CF

Vtamlist

Hi,
From 6 month I'm using 2 Nokia IP530 with the PfSense on a CF Card.

Nokia IP530 has 4 NIC, 2 hard disk and a CF slot; no CD, no VGA, no keyboard, no mouse.

On the original configuration (Nokia IPSO Operating System) boot starts on CF and CF starts OS from the first HD.

Using Search function in this forum I've read a lot of posts and I need some suggest…

Or, if you prefer, I need your opinion on my statement...

Can I search and use a boot manager to load on CF with can start PfSense (naturally Full install) from HD ?
I can use a Microdrive to install a Full version and boot my NOKIA:
can I use Microdrive on CF slot and hard disk at the same time ??

Thank's in advance and excuse me for my bad english !!!

Claudio