Using Zend Framework with CodeIgniter

[eluser]fredwu[/eluser]
[quote author="John Fuller" date="1203560408"]Doing this (using just one library and leaving the rest behind) requires changing all the paths and copying over all the dependent files though because the default structure assumes you are using the entire Zend library.[/quote]

I don't quite get this part: why is using one library file requires copying over all the dependent files? By default all the library does is to make sure the include path is set correctly so that when loading ZF classes, it knows where to look for them. There is no file copying involved during the library initialization stage.

Or am I missing something here? I haven't looked into ZF too deeply yet so I might have misunderstood how ZF works internally.