Visonic Powermax Programming

I bought and installed this kit and all went well but i failed to spot in the instructions the devices were already pre enrolled, i added an extra pir, door contact and 2nd bellbox which are all visonic products.
What im wondering is can i just delete the existing pre programmed zones and start from scratch or will the panel revert back to its factory programmed state?
Thanks in advance.

http://www.visonic.com/powermaxcomplete-quickfit-kit-uk

never done this but if its removed its removed.

the idea is that you buy with xyz devices learnt to specific zones and its just a case of screwing up deleteing and replacing with other devices should be possible.

Tried it out yesterday and seems to have worked ok.