Key Replace

Dear dolphin experts,

I'm trying to understand how dolphin works. One basic question is how the placeholder in the template are replaced.

There is a callback function named TmplKeysReplace in the design.inc.php but I don't found where the function is called. There is a preg_replace_callback with TmplInclude as callback function and one with TmplIncludeBase but I don't found the preg_replace_callback with TmplKeysReplace as callback. When I rename the function TmplKeysReplace to any other name I get an error

"Warning: preg_replace_callback() [function.preg-replace-callback]: Requires argument 2, 'TmplKeysReplace', to be a valid callback in /development/dolphin1/inc/design.inc.php(517) : runtime-created function on line 27".

Runtime created? Where is the function to create runtime code?

well if your trying to figure out how to remove the keys or banner of dolphin ads then your trying to hack it and your asking how to correct ?

this is not the place if you are and if your not then i do appolagize.