The supports not here yet and at the moment probably the main focus of the devs will be that you can play games with having a disc in the bd drive and surely someone will work on this so wait a bit and soon you'll be able to play backups.
You can use the swap disc method here not sure if it still works or not haven't tried it for a long time.
I also have a launch 60gb an I noticed something about ps2 and psx games on the ps3 running Jailbreak. Neither one would show up in the xmb but in ftp server they show up just fine. Is dev mode in ps3 meant to not be able to play those games? Or does it have something to do with the payload of the JB itself psfreedom in my case. Any way it would be sweet for a dev to come out with a usb loader for those systems that have the hardware to play them.
It's maybe just a matter of time then, it would be nice to have all my ps2 games on my hdd. And my blueray drive on my 60GB is not working any more, so im so happy to see that a no disk needed for backup maneger is on the way lol.
Maybe i will try the swap disc method, i think my brother have a swap disc still, i hope...
But i have 2 ps3's that on 3.41, so that nice :-) So if i get the 60gb virsion working with backup then i can update my NEW one.