Spree and Rails 3- How do I add a blog?

I have a simple rails 3 site consisting of blog,static pages and a gallery. I want to add a store to sell photos using spree. I have read through the guides and had a look at the source code but I'm still unsure of how spree integrates with an existing site.

Do I have to generate my blog model as an extension? (so I use the admin functionality of spre开发者_C百科e) and do the same for my other two models?

Are there any tutorials that cover this sort of thing?

Right now there's a blog extension, maybe it helps you http://www.spreecommerce.com/extensions/100-blogging-spree-spree-0-30-rails-3-compat. There are some problems with 0.40, though...

The above link is broken. Here are two spree commerce extensions.

1. spree essential blog This one is a complete blogging solution for Spree Commerce with multiple-blogs, archives, categories, tags, disqus comments and related products. This extension relies on spree_essentials for it's editor, uploads admin and tab in the admin.
2. spree simple cms This extension add support of a simple CMS and Blog for Spree Commerce Shop,