Sub Galleries by picture.

I'd like to use your product as a product showcase with options.(Client sells products but not online, shopping carts are not what we want). So I'd have a product, with a few variations and some details about each one, like specifications and in stock or out of stock. If they click on a main image I'd like it to pop up with the image and details and let the user scroll through the variations in a slideshow, so here is the breakdown of what I'm looking for:

I'd like to have a gallery page with the default template/cropped images in grid, and when you click on the image it pulls up a sub-gallery slideshow, instead of the current gallery slideshow, is this possible?

As a work-around, I thought maybe I could skip subgalleries and make a bunch of main galleries and embed the first image of each slideshow into an article creating my own grid, and then have it popup with each slideshow... so for this to work, can you embed a single image into an article and have it bring up the slideshow without leaving that page?

Also wondering if you have a backend demo, there are quite a few things I think I can work to make your software work for a client, but hard to tell without the backend access?

Finally, If I want to upgrade the plan to your bundle can I just pay the difference within the first thirty days or so? I think that if the droppics works out that the dropgrid may be a fit too, but so far I'm only onto the photo part of the project and don't know if I'll need the additional software.