Gabriel,
As a long time professional web designer I noticed, and cringed at some of the advice given.
First, just because a site will fit your large wide screen monitor obviously doesn't mean it'll fit others. By setting your maximum width to fit 1000px your site will be sized appropriately to fit the most common browser/screen resolution, 1024x768. However, you mustn't stop there. You might get the background to fit the width at 1024 wide but you must be careful with text, buttons, graphics and animated elements.
I took a look at your current website and the text, logotype and buttons are very large. You should keep text at no more than 80% in your CSS. By using percentages you allow your visitors to increase or decrease the sizes however they need. You also need to shrink your buttons by half. A button needs to be no larger than for a standard cursor to fit on it height wise.
Another person said to set a table width to 100%. That is a huge no no in web design. You should never use tables to create a website layout. Tables are designed for tabular data. You should start designing your website in CSS. There are numerous tutorials on CSS or you could purchase a CSS/xhtml/php template online if you cannot write CSS. Also, you could hire a designer to create a custom gallery for you. posted in Web Site Size