I have 2 blogspot blogs, one on internet resources and another on online video advertisements. Seperately I also have a Tech related domain which I bought sometimes back from GoDaddy.com Now I have created a new blogspot blog and linked the domain with that blog with the help of custom domains option. My plan is to combine the other two blogs I have into one that would come under the custom domain. So I have manually shifted the posts too. However, now I have 3 blogs - 1 on internet resources, 1 on online video advertisements and one having all the posts of the other two which means there could be a duplicate content issue. So now, is it possible to forward the first two blogspot blogs to the same custom domain so that there would say abc.blogspot.com, mno.blogspot.com and xyz.blogspot.com all opening at the domain say 123.com? If yes, how? And is it permitted too?

A li'l help would be great...