Hey, thanks for the replies!
I've actually acquired an xml file from the webmaster of the external site. It has all the "transfer data" with a few tabs full of properties and values. He of course is too important and professional to explain anything to a newbie so he just basically told me to "code it in", can't blame him though.
So this file supposedly has all the information I need, but I don't even know where to start. I suppose there is a plugin (something like All Import) to import this xml sheet to my database.
I suppose I just need to study this plugin and see if it can actually help me out on this matter.
Wish I had picked up coding and web design back in school