jQuery Grid Plugin - jqGrid

I'm trying to use jqueryGrid but what i want to do is a little bit more complicated.

I want to update in real time my table (with the XML(call every x seconds)) and only delete or hide the rows wich are deleted or insert the new rows, but i need to display the new rows in a special way : 
Let me explain : 
XML request 1 send : 
1;Tomato 2;Apple 3;Salad 4;Carot

XML request 2 send :
1;Tomato 3;Salad 4;Carot 5;Potatoes

I would like the second row disapear with a effect (fadeOut) and the rows below move Up. For the row 5, i just want a new row appears with a fade in.

Any way to do this with jquerygrid ?

thanks a lot