jQuery Lightbox edit WP insert image settings

Hi guys

I like the black-box image pop-up used on many sites and the best I’ve seen so far is jQuery Lightbox by pedrolamas.

The snag is this – Each time I want the black box effect to work I have to swap from normal post edit mode to code and insert the simple tag – rel=”lightbox” into the wordpress default insert image tags.

Can I tweak the root code somewhere to include this every time automatically? the reason this is a snag is because if I swap from code view to normal view and save the post it drops the tag I just edited so all posts with images have to stay with code view.

My options seem to be:

1. Find and use a far more awesome plugin??
2. Hack the code to include the tag

Please advise. I can tweak theme settings but this is deep in WP itself.