How to pick Popup-ed image from lightbox2 into CCK ImageField

Dear all,

Urgently need some help.

I have created an image gallery using brilliant_gallery module.
I am showing this gallery in lightbox 2. The gallery is shown perfectly on the lightbox2,
What I want is, to select/pick image and add it into CCK imagefiled while user creating the node.

Module Description:
drupal: 6.20
lightbox2 : 6.x-1.11
Brilliant Gallery : 6.x-3.6

Regards
Abhishek Dabas