Hi Jan,
I'm been using Shopify for almost a year. I've studied this for our eCommerce site, and the best solution, no coding required, are the 2 options below:
1. For your existing Shopify site/theme use: Variant Images plugin (see http://apps.shopify.com/variant-images), and your Shopify Product CMS is built-in for Adding in Multiple Product Options and Product Variants (see http://support.shopify.com/customer/portal/articles/361613-adding-in-multiple-product-options-and-product-variants-).
2. Use a Shopify Theme that has built-in Variant Images, which is already coded, such as: The Mobile Theme (http://themes.shopify.com/themes/mobilia/styles/tokyo). This theme also allows you to put in videos in your variant images, create for your product Marketing, Selections, Instructions, etc.
A Little Bit About Me: As well as our Shopify eCommerce site (www.latatude.ca) that I designed, I also build Wordpress Websites. For eCommerce or website creation, you can see my Plans at www.http://colorpunch.ca, this includes all pricing details.
Cheers and have great day,
David Doyle