Protect webdesign templates

We sell high quality templates online and will start soon 'renting' out templates to some companies, who are including them in their programs. but also other templates bought from us have certain server license, meaning that they are only allowed to install it on 1 IP and other templates go pr.domain. The point is, i would like to (in howfar as possible) keep some kind of track on these templates and protect this by an encrypted code which i can generate myself. I also need to figure out some kind of solution where this code can not be removed otherwise the template would not work. (sounds allmost impossible for me, but maybe to protect certain areas of html, but those can be easily re-written off course.) maybe a small coded [login to view URL] or so could do the trick. So that proberbly would mean that im in need for a small program, that would be able to: - 'track' where a template is installed. - protect the code by encryption. UPDATE: ok, concerning the 'track' part: What i have been thinking.... We have an advanced statistic system called Urchin, which can keep track of referal websites and counts hits. maybe i just need to add 1 line of code, but that one should be hidden some kind in the template and includes a link to our stats system, that way i can see exactly where a template is installed. offcourse, if somebody removes the code, this would not work anymore. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables): a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Linux, Windows, PHP, MYSQL, HTML, CSS