Hi GOVINDKRISHNA
Why do you need to add new files? 1.0 and above support files
larger that 2gb (on platforms that support it).

Also you can pre-allocate secondary files without backing up and
restoring, by using ALTER DATABASE I believe. They will take up
negligable space until the database requires them. So you could pre-
allocate 10 secondary files giving you a safe size of 20GB.

Alternatively, you could run an app/script on the server which
checked the file size of the database files and use this information.

Regards
Ian Newby