Tyco do not allow release of their software as its is a proprietary product. They do not want any old tom,dick or harry getting hold of the software, because they will then lose the maintenace contact for the said building (this is as we know the real reason!)
One disadvantage of having a system that can be worked on by any maintenace company is that they a problem can arise where they are unaware that they are using old versions of software to make changes, these versions often have software bugs the engineer does not know about. I have come across many incompetent engineers who have made software changes to a fire panel using illegally obtained software, who would not know one of of a PC from another.
The advantage of sticking to a proprietary product, is that the software can be updated easily, and any bugs found, can be easily rectified by upgading to the next firmware/software release.
On the upside, Tyco do allow release of their software to customers, as long as they sign a disclosure aggreement, so this may be one route you can take.
I have trained many customers (Tyco) on fire panel software cause and effect, who have obtained the software (legally), and are now maintaining the property themselves, as long as they have the correct training, knowledge and have passed the technical training course, then there is generally no problem with them having the software
Contact your local Tyco office (ADT,Wormald, etc,etc) and ask them!
Good luck
Gary.