I'm not sure I understand the point of your post. Are you saying that:

• the CGI.pm documentation specifically describes how to do what I asked? If so, I need a better hint as to where. I had already read the links you referenced, as well as Lincoln Stein's book, but I couldn't find the answer to how to attach a text box to a radio button using CGI.pm. That's why I posted. :-)
  (I already know how to generate a radio group or a textbox with CGI.pm, and I could probably hack something together, but I don't think it would be very pretty.)

• there are some undocumented features hidden in the CGI.pm code that I could exploit to meet my requirements? If so, I didn't see them.

• rather than roll my own, I should modify the code from CGI.pm to do what I want? Since my code doesn't need to fit into Stein's fairly complex environment and doesn't need to be that generic, wouldn't that be kind of silly?

Or it may be that I missed your point completely. I'm not trying to be ungrateful; I just need some clarification. :-(

Thanks.
Impossible Robot