Forwarding album pages but not image pages to G2 install...?

I have upgraded (actually a few years ago) from G1 to G2... I have looked at G3 and don't really like the changes so I think I'm sticking with G2... Anyway... I want to leave my G1 install intact (I'm actually rebuilding some of it after deleting it, because I realized that all the old entries in my livejournal hotlink to images from those urls in my G1 install and when I deleted it they all broke... so I want those to work again)...

What I'd like to do is have pages that are showing a single image to work just like they do, but if someone tries to view an album page, it refreshes the page to the G2 installation front page and the new gallery. I don't want people doing much browsing around in the G1 install, you see, I just want the individual images to be available.

So is there a template somewhere for just album pages or whatever that I could add the refresh tag into the header... but it wouldn't affect the page template? Does that make sense?

Thanks for any help you can give...

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): http://http://gallery.opalcat.com/gallery/main
Gallery version: 1.5.7
Apache version:
PHP version (don't just say PHP 4, please): PHP v5.2.17
Graphics Toolkit: ImageMagick
Operating system: Windows Vista
Web browser/version (if applicable): Chrome

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WebKat