Dezend encrypted php script

I'm looking for PHP guru who can decode zended script and/or cross permanently over the domain licence restriction. In fact, the script is to buy for only one domain and have few file zended for this purpose. I need to decode theses files and avoid the domain licence restriction to be able to install this script as many time I want to. I also will need after some php modification on it. ( I already have this mod on previous version)