Vishal,

Send me a personal message with your email address than can accept an attachment.  I have written a utility that will compare as well as transfer dts packages between two different servers.  It avoids the need to manage any type of storage or backup files.  I believe this is exactly what you are looking for.  I wrote this utility to keep a dev and production environment in sync, containing over 80 packages.  I would be happy to send it to you if you think it would help you solve your problem.

-Mike Gercevich