I would like to allow customers to select their own currency so they can see prices in values they understand, but when I do, Zen Cart attempts to check out in that currency too and I can only accept USD. Is there a way around that?

I downloaded James Fitch's "Display Different Currencies" version 1.0 that displays prices in other currencies in the product description. That solves the problem above, but James wrote that for Zen Cart 1.37.
We have changed the database for 1.38 so his program just displays any price as Zero. Does anyone know how to fix this?

I tried e-mailing him, but didn't get a response.