Create a workflow who linked two infopath forms 2010

hello
I'm beginner in sharepoint 2010 and I want to know how I can send a form field to another infopath
2010 form with workflow.
for example I have a data field in a form (First Name) and I want to send it to another form library
how can i do that??
for more information watch this video:
http://www.youtube.com/watch?v=Cefqn-pVbHc
it is very urgent for my intership ,please help me.
thanks before