A way to make Gallery 1.5.x open a new window when zooming image to full size

The following information is required to get an answer:
Get this information from the PHP diagnostic (in the configuration wizard).
Gallery URL (optional but very useful):
Gallery version: 1.5.1
Apache version: IIS
PHP version (don't just say PHP 4, please): 5.0
Graphics Toolkit:
Operating system: Windows Server 2003
Web browser/version (if applicable): Opera/IE/FF

Hello!

I would like to know if it possible to easilly configure the gallery so that when user enters to see the pictures in full-size it would open the gallery in a new window... Because currently the gallery is embedded in my page and full-size images don entirely fit into the screen when opened. Lower zoom levels like thumbnails and mid-zoom fit ok but full-size images are large and I'd prefer to open a new window for them. (With the Gallery UI of course.)

I hope someone understood what I am asking for. I am not too with php my self. Thanks!