Your real mistake was after you reconnected the wrong drive and disconnected the right drive without first rebooting then you should of powered down and disconnected the right drive, Plus did you power down before disconnecting any drives?
Have you tried reconnecting all the drives back up?
Install an OS on another drive and use this Freeware Raid Reader to get the files off.
If that does not work get RAID Reconstructor.
I didn't do any 'hot swaps'. I turned off the computer and unplugged drive 3 of 4 (failed one was 4 of 4). When I powered up, I saw in the bios/options screen that Disk 3 of the array was now shown as 'Failed' and there was no disk 4. I powered down and reconnected disk 3 where it was and disconnected disk 4. I expected to see 3 good disks and a missing/failed 4th disk. However, I now saw an 'Unknown' disk in slot 3 -- it wasn't able to recognize that disk as its old 'good' disk 3... and hasn't since.