subpackage proposal

Hi, I'm wondering the best way to solve a problem that may not be unique to phpDocumentor. Right now, we have several converters, and the codebase is getting rather large (we're almost to a megabyte, compressed). I'd like to be able to release the core and converters separately, to allow users to download the converters they plan to use, and not the others. Not everyone, for instance, will need the CHM and PDF converters. Is it possible to release subpackages, and tell pear to install them in a subdirectory of PhpDocumentor? This would be wonderful, as we could release updates to the core without having to re-upload the converters, or vice-versa. It would allow separation of development of each converter, and we can give different version statuses (alpha for the XML:DocBook converter, beta to the PDF converter, stable to HTML converters, for example). Thanks, Greg