You can modify stock so it can see the sdcard partition on the hybrid SD. Go to my obsolete hybrid thread here:
and flash one of my stock vold modification zips. I have one that makes the stock /ext_sdcard show the hybrid sdcard and one that swaps the SDs so that stock sees the hybrid /sdcard as the stock /sdcard.
Sent from my BN NookHD+ using xda premium
See my Nook Color Tips Thread here
and my Nook Color EMMC Partition Repair Thread here
and my Nook Color Updated CM SD Installation Instructions here
and my Nook HD/HD+ stock tips thread here
and my Nook HD/HD+ CWM Root Tools thread here