Integrate Home Security System or Video System (?)

[mikerobb]

I have an existing home security system (GEM P-800).
This is a fully wired home security system (doors, windows, motion, etc) which is wired currently to the security central 'box'.
I am looking for pointers on:
- Is it worth integrating the security sensors/system into X10?
- What is the best (cost factor or ease of integration factor) method to proceed?

I also have a home surveillance system setup and running under zoneminder.
Is it worth integrating this into X10?

Thank you