Hi jondixon,
Easiest method to center the content vertically would be to add a tag like this:
<body>
<table width="100%" border="0" cellpadding="0" cellspacing="0" id="okvir"
align="center">
Since everything is 100% that should pull the page into center of window. Your main content areas will remain at 790px unless you change this width in the style.css for the id 'table#okvir'. 100% width in a 790px space if fine.
There are some other issues in your mods from top to bottom, mostly "" out of place, and missing close tags on open <table> etc. Theme looks to work with <table> errors but you could fix then check if fixes are good.
Line 31: Document type doesn't permit attribute “Everything” within element “<img>”.
Line 31: Document type doesn't permit attribute “Christian” within element “<img>”.
Line 31: Document type doesn't permit attribute “in” within element “<img>”.
Line 31: Document type doesn't permit attribute “Atlantic” within element “<img>”.
Line 31: Document type doesn't permit attribute “Canada.""” within element “<img>”.
Line 48: Document type doesn't permit attribute “"” within element “<td>”.
Line 28: Close tag for element “</td>” omitted
Line 93: Document type doesn't permit attribute “"” within element “<td>”.
Line 96: Close element “</td>” found but element wasn't open.
Line 97: Close element “</tr>” found but element wasn't open.
Line 98: Close element “</table>” found but element wasn't open.
Line 117: Document type does not permit element “<br>” in content of element “<tr>”.
Line 112: Close tag for element “</table>” omitted
Line 116: Close tag for element “</tr>” omitted
If you do set page to full 100% width and want to offset the page left and right in the full window put this in your css body tag
margin: 0 10px 0 10px;
(so your left right columns don't end up tight against left right edges at 100% width. Replace the code that is already there with 0 10px 0 10px.
If this is how you want the alignment to look
link then I'm on the right track.
I editted this post in regard to the style.css
Have fun!
rocket98