Text within custom shape

[Boris Mayer-St-Onge <boris gmc ulaval ca>]

I'm a new user of Dia and after playing a bit with it and reading some 
documentation, I have a question. How can we add text (otherwise that 
the <textbox/> element) to a custom shape?

I was able to create some new shapes and new sheets, but I'm don't know 
how to add text. I found some shapes with this functionnality, but I 
wasn't able to find the corresponding .shape file. For instance, the 
"time scale" into the Chronogram sheet, the "KAOS control link" into the 
RE-KAOS sheet and the "Regular step" into the GRAFCET sheet.

Thanks for any informations.

Boris