Centering the whole site???

Can someone have a look and let me know how to rectify this

The main page is fine the header is centralised to the rest of the page - but if you go to a category the header is fine but the second half of the screen is not centred -

I have been adding space marks after the text to acheive the centralisation but surely is there an easier way ?

http://www.bunchesspain.com/shop

thank you this is the link

I have just made the logo smaller and this has helped somewhat but if you click on the spanish section its a mess ??????

You're using frames and I was not able to check your stylesheet

Yeah, what's up with the Frames? Cannot see where they would be needed and they are definitely not good to use.

BTW, your Header image is too big and not using proper center code, which is why the problems with it.

Didn't realise I WAS using frames - I just copied the text from my previous site to the main page only.

I will try and change this - what is the code I should be using for centering the header please?

Thank you for all your help in advance - any ideas about the side boxes in the spanish site - I cannot change the layout through the admin for the spanish site only. as I would turn it off completely if I could to save work !

I changed the text from the frames in the spanish site and it looks worse !

here you go guys.. non-frames version: http://flowers-in-spain.com/shop/index.php

Any further ideas? or could it be a problem with the Spanish version ?

#mainWrapper {
background-color: #ffffff;
text-align: left;
width: 750px;
vertical-align: top;
border: 1px solid #9a9a9a;
}

As the width of your page is 750px, you cannot have an image larger than that. For now, remove your Header image to see what I mean. Resize it to around 740px to see if it fits, adjust from there.

Might want to use the sample page provided by getyourgameshere.com as a starting point for removing frames, since it appears your site is still using them.