This is not an easy task but it's doable. You will need the directory that TiB stores the backups in, copied to your HD. Find the rovio files, I think there are 3 of them. The versions of Titanium (TiB) must be identical as well. Now comes the tricky part, restoring data.
I had some issues with Tib on the GN, I couldn't find the backup directory on the sdcard. Perhaps a reboot or 2 did it, but nonetheless you need it to show up. Once it does you should be able to copy over the 3 files from your computer and do a restore of AB plus data. I did it from my Tbolt with AB and Rio. BTW, a new level of Rio just came out. ;-) Anyway, good luck.