[Chameleon] chameleon service instance

[BAUD remi]

Hi the list,
 
Does anyone can give me a small example of context file and template file for testing my service instance (chameleon.php) and my configuration? I've tried with the small example in the HOWTO but I don't know what I have to write in my context file.
 
Is it mandatory to use context file when a don't work with remote datas (only local files)??
 
Can I use with chameleon a  mapserver's .map file that I created with maplab for example or another existing map file?
 
thank you in advance...
 
cheers!