Creating an Image Loader Plugin Based on Categories

Hi
I have a WordPress enabled Photography website and I would like to develop my WordPress theme by creating a custom plugin.This plugin is suppose to help me to upload my images in a specific section in a specific predefined page. For example I have 4 pages as “Nature”,”Commercial”,”Art”, and “Portrait”. There are a Gallery content in each of these pages as:

<div id=”gallery” class=”clearfix”>
<div class=”gal item”><img src=”img/gallery/Beauty/gal/Beauty1.jpg” alt=”CPan Photo” width=”231″ height=”149″ class=”colorshift” />
</div>

Now what I am thinking is :
1- Creating Custom Categories(Like Cat1, Cat2, Cat3, …)
2- Creating Products custom Post Type Template and and Product Catalog.
The Product will have an option (list of all custom Categories) to associate each new created product to one of Categories.
3-The Products Catalog will let me to edit existing products in the future
4- Finally a Code in Custom Page template to loop and display all products associated to one specific category, let say Cat1 in one specific Page let say Art

I am sorry if this is too much but I really need to see if this logic is correct or not?!
Can you please let me know if this is correct to do and if so is there any good resource to get start.(Except of WordPress Codex :-))