Drupal 7.x

i have a drupal 7 site up and running already on a domain. Now the customer wants the same site on another domain (not on a subdomain). It has to be possible to change content at each domain. Products and news should remain at one central database. So when adding a new product or newsfact this should happen only once and at one place.
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I'm trying to learn omega and have my base global styles so I can style the regions. but how do I style the blocks, content, etc without breaking the grid?

Thanks,
Doug

Is there any module to add link ref into tags o the only way to do it is through template theme files?

I've got a D7 built & launched. It's for a furniture (bricks & mortar) store, and features products (I've got a 'product' content type). Client would like to start adding e-commerce-like features, without actually building an e-commerce site (they don't want to do online transactions, yet). Anyhow, the first feature they'd like is to allow visitors to build a wishlist (and then let the sales folks see it).
Ubercart had a wishlist module, but no D7 version.

I need to add an extra id to all my pages, so standard breadcrumbs not working. Is there a function I can call to just pass my own desired breadcrumbs within my programmed modules?

For the Legal module ( http://drupal.org/project/legal), I want different conditions required for different roles. Is this possible? How is it done?