OK, thanks, Raulg3, i appreciate it very much!
Before i start, here's my setup:
mobo: ASUS M2NPV-MX ACPI BIOS Revision 0702
Southbridge: nForce 430
2 xUltraDMA 133/100/66/33
4 xSATA 3 Gb/s ports Support RAID 0,1,0+1,5,JBOD
NVIDIA MediaShield™ RAID 0, 1, 0+1, 5 and JBOD span cross Serial ATA drives
CPU: AMD Athlon(tm) 64 Processor 3500+
RAM: 2 * 512 MB
Disks:- at0: 120 GB System disk
Pool: Music - Mirrored:
- at4: 160 GB
at6: 160 GB
Pool: DataRaid1 - Striped:
- at8: 1TB
at10: 1TB
I tried booting liveUSB and burned a LiveCD (OO'er! new 507 version), installed embedded x86 on the USB memstick, and booted from that. Now, i'm getting weird errors, probably related to my nVidia chipset, where NAS4Free recognizes the MediaShield RAID functionality, and thinks, my first pool is a nVidia RAID stripe ar0, even if the nVidia RAID functionality is DISABLED in BIOS! But, thats another story.
OK, so when I boot from USB-CF Embedded install, and do a config restore (with a modded config as per
these instructions, I only get my DataRaid1-pool recognized! As per above nVidia problem, I'm getting nervous if NAS4Free will destroy my first Music-pool,
zpool import -f Music doesn't work, it says its an unrecognized, possibly damaged pool! OK, whats going on here? I can reach the webgui, but I'm getting nervous about that faulty pool, and decides to boot back to original 0.7.2.8191system.
Trouble begins: Boot up process is stalled several times, first when it tries to load the configuration, and several times after, like when trying to mount local disks. I have to escape the stalled commands with CTRL-C, to continue boot process. Finally, the system comes up, even my Music pool is working!!

all services are working including SSHd and my custom installs (Headphones, Sickbeard, Subsonic, etc..)
EXCEPT WebGUI for the NAS!!!!

It seems, as i was restoring the modified config while booted into the test N4F 507 embedded install, it changed configuration on my ORIGINAL install! wtf? And, because I cannot get to the webgui, i cannot restore to a proper config!
So:
- Is this a bug, that N4F writes changed configuration to original system disk, or is it a feature?
- How do I restore the original config, without using the webgui? Manually edit /boot/loader.conf|rc ?
Thanks in Advance,
Gabriel S. Hansen
NOTE:
Here, I have to add, it is
NOT possible to install Full ON A CF/MemStick, at least not from within the console menu, and I can't find any proper instructions/help on how to upgrade from embedded to full on a Flash-disk!