On IIS you have the ability to redirect the whole domain with a HTTP ReDirect 301 which also takes care of URIs with something like :-
Redirect requests to this destination : http://www.eriks.co.uk/$S$Q
This then takes anything that follows and re-maps to the same URI on the new page. (assuming and providing the URI's are going to be the same!)
The other option would be 301 redirects to avoid the SEO hit being as harsh.
I have combined a number of sites in the last 12 months in this way.
Good luck!