Enable Smarty to handle class methods as filters, handlers etc!?

Hi, I usually use a little abstraction class to access smarty, it provides some functions like an extended display() method, which assigns $_REQUEST, or a constructor in which directories are set and filters are registered. Now I have encountered the following: I want to have, for obvious reasons, my own pre/post/output-filters, cache handler function etc. within this abstraction class. In the case of outputfilters, this is quite easy to manage, I can just change $this->_plugins['outputfilter'][$function] = array($function, null, null, false); to $this->_plugins['outputfilter'][((is_array($function)) ? $function[1] : $function)] = array($function, null, null, false); in function register_outputfilter() in Smarty.class.php But now, if I want to have my own cache handler (this seems not to be possible at the moment, as $function() is used to call this one) or prefilters, I need to keep my functions outside my class or do some deeper hacking into Smarty. I guess it's generally a good idea to make all of Smarty's methods, which register any sort of function (be it a filter, or a resource handler, or a cache handler), capable of handling class methods. How about implementing something that is similar to most of php's functions' capabilites to handle eiter a single function name or an array with both class and function names in it...? Just my 2 cents, David