Hi Sunil,
Sorry, but I meant to post download questions here. The e-mail link question is a generic InfoPath question. Anyway, no big deal.
To remove the attachment, go into the Tools->Data Connections and Modify the e-mail submit. Delete the Attachment Name.
To add the link you'll have to write an OnSubmit event handler and edit the text for the e-mail body to add the link. This is more work, but it's quite doable and we have done it a lot.
Patrick Halstead [InfoPath MVP]
InfoPathDev
Patrick Halstead
Project Manager at Qdabra