Questions: Uploading an unknown number of files with Quickform

Pear package: HTML_Quickform Pear package: HTML_QuickForm_Renderer_Tableless Hi, I'm using Quickform for my Forms and I'm very happy with it's functionality so far. This time I want to have a form with mostly text-fields and the possibility to upload 0,1,2,3,... (an undetermined number of) file attachments. Also I would like to use the form to maybe later delete one of the attachments again and upload another file. I guess I would do this using a subform? but I couldn't find any code examples and no hints in the documentation about how to do this with PEAR Quickform. Could anyone help me out with a code example or link or telling me which functions I have to use. Thanks a lot in advance, Greets, Christian Karlsruhe, Germany