Update: 5/16/11 the udidfaker from that source has been update to the latest one, but if you still needed the old version, let me know and I will upload the the old version so you can install it either through ifile or terminal.
PLEASE NOTE that there’s a working udidfaker for ios4, you can get it from some of the sources on the cydia sources page in this site, this tutorial is just in case you didn’t like the newer version.
For all those that upgraded their udidfaker to the latest
version and didn’t like because it has to many bugs or for whatever
reason it might be, Here is guide on how to get the old version
back!
NOTE: old version version works perfect with iOS 3.x.x devices, for
the rest of us that have iOS 4.0+ it crashes so you need to use
ifile in order to change udids. Steps For iOS 3.x.x: *Make sure you
have your udids save some where safe.