Currency switcher module, Canonical Urls redirect

-- HikaShop version -- : Starter

Hi there,
Currency Switcher
1.How do I edit the code for the currency switcher to include country flags instead of the country currency and code.
2. I would also like the drop downs for the currencies to redirect to another domain, while retaining the currency switching functionality.
In essence, all I want to do is select a country flag from a dropdown and then redirect to a specific domain of mine e.g a.)clicking on the usa flag will redirect to mydomain.com and display currency for all products in USD
b.)clicking on the UK flag will redirect to mydomain.co.uk and display currency for all products in GBP

Canonical Url Redirection/Navigation
I have made my products to redirect to external links on click, but now I need this links to open in a new window in the browser, rather than on the same page. How do I go about this?

I have been able to enable my product links to redirect to a new tab?window using the method you suggested. Thank you.
As for the customization of the currency switcher module, I have created an override in the html folder for the currency switcher module. Please could you give me more assistance/information on how to achieve what I need?
I have downloaded a sprite, with a png containing all the country flags I need to implement in my dropdown as well as a css file.