How to create a child widget, linked and of a different size?

[wysota]

When you were talking about the "link" feature, you mean the linking in between windows within winamp?

I meant that if one window moves, the other moves with it. That's what I understood by your "link" term.

In hopes of it being ez-mode, I thought you meant there was a function buried somewhere to link the two windows easily.

From application's point of view windows are independant. It is the window manager that may control groupping them. What you are trying to do now is to work around the window manager.