Hi,
It does explain you that if you want to know what are the files involved, you can just turn on the "display view files" setting of the HikaShop configuration.
Also, I don't even think that you need to edit the code of the views. You should be able to do that with only CSS by having each block's main div floated left or right, and its width limited to 50% of the page.
And the top of the page of the link Mohamed gave you explains how to edit the CSS in HikaShop.
So if you know CSS, you should be able to pull this off.
Otherwise, you might want to contact our partners for a quote on that customization:
www.hikashop.com/home/our-partners.html