Adding a Sidebar on a specific theme template (CPT)

hi,
I have a custom taxonomy and Post Type. Already registered and all working fine.

I managed to duplicate the Boldial “archive.php” file into “taxonomy-myCPT.php” and it is being called perfectly by WP.

How can I add a custom sidebar created in the WP interface?

Even calling get_sidebar() directly it shows nothing…
I’m a programmer, so you can throw me code, I can handle…

Cheers.
;)