Could you post an image to wish bits your trying to change and what you want them to look at mate?
What your trying to do does not work well in IE.
http://www.banksiaadventures.com.au/choose-your-australian-tour-adventureThe boxes here could be something you can copy the code from if your trying to do something like that.
General centre of text...
To vertically centre text to work across all browsers if you have a single line of text...
height:30px;
line-height:30px;
Simple as that really.
If you have a chunk of text you just have to do it manually with margins and the container using overflow:hidden; to avoid box model problems etc.