Loading event on external site

Hi, I'm trying to figure out how to load an event-page into an external site. Basically I already have a client-login system going on my website which includes previous transactions and lots of other info / stuff clients use. So what I want to do is create an event for each user, and load the gallery-list from the event into peoples client page on my own site.

I'm running a wordpress installation, but I'm not at all afraid of dipping my hands into php/jq/js or whatever, I'm a fast learner and code usually makes sense to me.

Thank you very much in advance