How to get .SDA file from .ear in nwdi(7.0)

Hi ,

Can any one let me know how to download the .sda file from an existing  ear file from  nwdi( NWDS 7.0)

Since we are trying to deploy ear file through telnet it is converting to sda file and the vendor is changed to JAVAEE from xxxxxx and the changes are not deploying as a result of vendor change ( ear is not overwritten).

Quick response is helpful.

Thanks

Kumar