Checksum Error on restoring userdata*****.backup file
Stock Android recovery backup files can be restored with a Nandroid custom recovery, if you simply repack them into tar archive.

i put this two command lines in a dirty shell script (extract + repack as tar). thanks to ektoric figuring out his gunzip method!

the shell script will convert your backup file into nandroid backup automatically. download >bckp2cwm.zip&lt; at

From http://forum.xda-developers.com/showthread.php?p=65374561#post65374561