I know that the weather database .cab will not work with S2U2, I believe it is the regedit points to an alternate weather server that S2U2 is not accessing so the weather is not showing up in S2U2. I don't know enough about S2U2 to also have it look at the alternate weather server. Here is the post explaining the alternate weather server so that we don't have to modify the manila.exe.
http://forum.xda-developers.com/show...&postcount=128