[SOLVED] Please help me!!!

I'm a newbie so i will try and explain it the best i can......I have a template witch is yoo planet,it is made up of all different modules on the page with a black background. All the module background fade to transparent. Now what i want to do is change the black background of the whole page to a repeating image of our logo (which looks good) the trouble i have is that all the modules fade to transparent so the logo image behind them looks way too busy. What i want to achieve is to have a black background behind all the modules & the logo background image around the outside.... does that make sense? Being a newbie i don't know where to start to achieve this.
Could someone please help me?