Hi,
I'm looking into how to display two currencies on the page.
The default state of the website should be displaying prices in GBP only.

If a user selects another currency in the now enabled currencies sidebar select list, I would like that second currency to be displayed underneath the GBP price of products on product listing and product details pages. Example, user selects Euro, the site now displays prices in GBP, with Euro below.
The sidebar select list (currencies) should not change the main currency, which always wants to display GBP.

The checkout must only allow GBP checkout but could also display GBP and the user selected currency prices.

Using version 1.3.7 of zen cart with the Gloss Black template and some sidebar header modifications.

I've had a look at some of the currency threads but none seem to address this specific query - if I've missed the one that does, apologies, and please point me at it :)

Cheers,
Rob