DSM-G600, DNS-3xx and NSA-220 Hack Forum

Hi,

I recently purchased a new 750GB HDD for my DNS-323 unit. Now I want to install it. The unit is presently fitted with a 400GB and a 500GB HDD, both full of data (I don't have any back-ups, I use this to stream media to my Popcorn, so loosing one or other is not a hughe loss, but still more work to reproduce all the content, than managing to copy everything).
The 400GB is on HD_a2 and has funplug on it and all my installed applications (mldonkey, llink, lighthttp, etc.), I would like to have an installation, where the 750gb is on HD_a2 and the 500gb stays on HD_b2.
What do you suggest, how could I reach this situation the easiest way, not damaging the data on my disks? I also have an external USB enclosure, if this could be needed (my idea was to install the 750gb into HD_a2, install funplug on it and than mount the old 400gb disk on the USB port and copy everything I need).
I have firmware 1.02 and funplug 0.3 installed (as these are working perfectly I don't really intend to upgrade things especially if this means formating my drives).

Thanks in advance

Tóni