[totallyconfused]

I've got two questions for anyone who knows their way around Cydia for my 1st gen iPhone. I'm trying my best to get the "Windows Perfection 2.0" theme on my phone, and it keeps popping up an error message that says, "Source Error: Size Mismatch". What the heck does that mean? Also, as you can see in the second picture, when I open Cydia it says (at the top), "Updating Database, Downloading Release, Downloading Packages, Error: Sub-process bzip2 retu..". Is that a problem? I'm assuming it is. Any help, in any form that can be offered will be greatly appreciated.