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Presuming it is a home page where you don’t need the right sidebar I would advise to go with one column layout which you can choose under CMS > Pages > Home page (or whatever your page’s name is) in Magento admin. In case you don’t want to the blocks to category or product pages either then you can use Layout Updates which can be found on product/category config page in admin. For example
<remove name="right.poll" />
should prevent Magento from loading the poll block. Layout updates are usually added to layout XML files under your theme’s layout folder.
If you’re new to Magento and not familiar with how XML layouts work then I would recommend Alan Storm’s book “No Frills Magento Layout”.
Regarding to the style changes.. Did you notice the demo link on the site? You should get a good idea of what the extension is currently capable of.