First of all thank you for sharing your work with the comunity...

I've just installed this mod on a 1.3.8 site with the cherry_zen template and a couple mods (easypopulate and ultimate SEO) but when you proceed with your order it crashes during checkout confirmation. Very weird... I've lost everything under under products list so no confirmation or totals available.

Can you give me any insight about this?

Thanks a lot for your time