How do I design script so ppl can install on their domains without giving code

[chiefrokka]

I have my football scripts all run off my domain with League ID's and everything (like how Yahoo fantasy has theirs).  ppl want to install the script on their domain so they don't have to go to my domain to run the games and so they can integrate it into their design.  I don't want to give my code out so they can just steal it, so what's the best way?  If on another domain, they would be checking my database to run the scripts and they'd be making their picks and altering my database that I'd store on my domain.  One reason I like it now all on my domain is because when I do updates I just have to upload the files to my domain and every league gets the updates.

 

thoughts?