Come to think of it, can you get the Key Disk from either of the two sites you were able to copy software from, if Yes then you're all set. Before starting up the software (CISN2700) put the disk in the "A" drive. At the pw prompt just press "ENTER", when you get into the software change or create a pw that suits you. Expect the CISN2700 configuration may be a little different than yours, it'll have parameters from the site you copied. Could be, but not likely to be exact. The Board # must be assigned etc. Sound like I have been thru this before. 3 Years ago, same thing happened to me. One thing that may be helpful if you do not have the PCISN Book (it details how to set the banks of 3 Dip Switches on the board) is to open up the "other sites" pc (where you got the software) and duplicate their dip switch settings. If your board was set up identical to the site that you got the software from, the software may then load looking for the board with the exact settings in the software. It that works, you don't have to know exactly how your board was originally set up. Hope that made since. BUT 1st, document what your dip switch settings are, that's very important in case you must go back. BUt 1st I would just try booting it up as there is a chance it'll work right from the get go. I have a PCISN book, the dip switches determine Board #, IRQ's etc.
Mine was not difficult to revive but I had help from a Micros tech on the side, he was the one that told that Micros has (at least their dealership) copies of all this stuff and they don't throw it out because there are sites that still use the software but they are instructed to tell people that it's not supported or offered if someone needs it. I understand why the local Ford Dealer does not have a muffler for a 1980 Crown Vic, but we are talking software disks, disks that hold software that "if unavailable" may render the entire POS system useless after a HD crash. If a software company doesn't treat it's own software catalog as "mission critical" don't even buy a pencil from them.
So in the end this particular tech had to violate company policy to "do the right thing".