Are you talking about moving all the metro apps off the SSD?
The easiest thing to do in my opinion is just junctions (symbolic links). You can move all your folders to the Seagate, and then create junctions that point to those so Windows can find them.
You need to download junction.exe and stick it in your win32 folder. Then you can run junction in cmd. See this page: http://technet.microsoft.com/en-us/sysinternals/bb896768.aspx