Setting up single product shop - VERY urgent

[jadedchron]

Hello,

I'm in a very serious time crunch and I'd greatly appreciate anyone who can help. I've never used Prestashop before and I'm using the latest version:

I have a site developed with clean, standard xHTML/CSS and it's ready to go for the shopping cart. I am only trying to sell a book product. There's absolutely nothing fancy about the process at all -- there's no need for featured products or anything at all.

They, basically, hit a Buy button and it takes them to the check out process with the quantity and such.

Does anyone have any information regarding the quickest and easiest way to go about this?

I'm intermediate with PHP and on a professional level with HTML/CSS, so don't be shy in that regard. I have to have this available in the next 12 hours, so time is of the essence on this one, unfortunately.

Lastly, they use Authorize.net. Is this relatively supported? I remember seeing an Authorize.net beta module.

Thanks so much,
-Nick