Updating Layout Files (Creativix)

Hello there.

I’m setting up a WordPress site for the first time, a personal portfolio site. Its been a lot of fun, even while there have been a lot of problems to overcome. I am running version 3.1.3, and using the Creativix theme.

I’m wanting to add a background image to the site, I’ve got a temp version up now. The problem is that the layout images were meant for a white background, and so many have white borders. I found the location of the images on my ftp, downloaded them, edited them in photoshop to remove the borders, and then saved them as .png files to keep the transparency (the original file format was .gif).

The problem is, I don’t know how or where to point to these new files instead of the .gifs within the site or the theme. If the new files were .gifs I could just replace the originals, but I don’t think that would let me keep the transparency, which is the main issue here. Since I’m new to all this, I don’t know if its a WordPress option I’m looking for, or a theme option (though I’d assume its a theme option).

Creativix lets you make edits to the .php files it uses, that’s where I changed the .css to begin with. But I can’t seem to find anything in these php files that directly references these image names to replace them.

Any suggestions? Thanks in advance.