restore after root question

I just rooted my Nexus One but had backed up the internal memory apps to the SD card using SD Memory Zone. The rooting cleared all saved data from the internal memory so now I want to replace it with my SD backup. I can see the backup data on the SD card but SD Memory Zone will not access it. It appears I cannot do a conventional restore after a root (I wish I had know that) but that I can do a “manual restore”. How do I accomplish that?