Sorry for late Reply,
The answer to the question is Yes and No.
1) how do you know it's an illuminations installation.
2) do you have pictures of the processor.
You need to know what version your system was programmed at, and have the correct version. which means the version on here might work or might need a previous version first.
Programming Illuminations systems:
Not easy, this would be a very steep learning curve... and it would probably cost you around £80 an hour to have an engineer come round and do this for you?
But you can do it and if you have the time it's a rewarding experience.
You might also want to consider your upgrade path, by that I mean illuminations when it was first introduced was the best in the business. However now it's not great for LED and also certain dimming methods (trailing, leading, etc). it is also very antiqauted.
You can hardware upgrade illuminations to HomeWorks QS this would need a qualified installer. I would do this slowly to budget if you can. start off with a HWQS processor, then slowly change the modules for newer modules. Also the programming for Homeworks vs Illuminations is night and day.