I'd like to update here, in case anyone who will purchase a 54831B/D/54832B/D in the future might need some help with setting up this device with an SSD like I did. Most of these things are on the forum (which was helpful for me as well), but it never hurts to read a bit more
First things first, getting the IDE->SATA adapter. There are a few options, including mSATA, and even using CF card with an appropriate adapter. I've decided to go with a regular SATA connector, seemed more robust as I have access to a few such SSD's/HDD's. There are quite a few cheap adapters online from various chinese vendors. Most of them get quite poor reviews, with many of the malfunctioning and others getting very low read speed. There are one or two that seem reasonably good, but I've decided against it simply because I didn't know what I'll get. I've decided to look for one that uses a Marvell IC. There is one supplier on Amazon selling these, and I've also found one seller on eBay who has an older stock of
these, so I've ordered a couple from eBay. One for use, one as a backup as these things are getting hard to find.
I'm using this adapter on the main IDE connector (straight into it, had to remove the floppy cable which was in the way, but its not like I need the floppy anyway), and an IDE cable with the CDROM drive on the second IDE connector of the board.
Next you'll need to find somewhere to get power to the SSD/adapter. The scope has no 4 wire power connectors like on regular PC's, so you'll have to improvise. I've ended up using a 24pin->20pin power supply connector adapter. The power supply and motherboard are both 20pin, so I cut the extra 4 pins out (GND/3.3V/5V/12V), removed the 3.3V, and soldered the other 3 to a regular 4 pin power connector. This can now be split into as many outputs as needed easily. If you ever decide you don't need it, simply remove this adapter and you are back to the original state - you only cut/solder the additional adapter cable.
As for software used, I've started with Acronis True Image bootable CD, but had some problems with it. First, it wouldn't boot with the external monitor on the MB VGA connector (which supports higher resolution than the main graphics card). I've used it on the 640x480 output instead, and saved an image of the disk. However, I was unable to get it to boot with this image deployed on the new Kingston A400 120GB SSD even after numerous attempts. I've ended up using HDclone 8 instead. It has a free version which I've used, and it worked great. It doesn't support network drives (unlike Acronis), so plan accordingly (either add another drive, or use clone instead of image).