I had visited this site earlier and I was also confused about this sentence :

"Approval Notice of the spouse - Form I-797 issued by the USCIS.."

But later I came to know that Form I-797 issued by the USCIS is for me.  Not for my spouse. How can she get I-797 approval here when she is not in US.  I consulted in Muthy Forum as well and got same reply.....

Thanks for your help.   Cheers.