I currently have my domain that I registered somewhere else forwarded to my yahoo account. Now I have a yahoo store for the domain, www.babymetwice.com. I want to add a blog, but the blog functionality is under web hosting management NOT ecommerce store management, so my question is how do I get the blog from being on site.babymetwice.com that I never even use and put it on my real site - the store

The only way to do this is to copy and paste. Add this to your new blog site like that or if you want, link them together.