configure.bat for blank property

Hi,

Im working for a client that want to run the configure.bat to update a property on the systemConfig.xml taking the information from the c:\xstore\updates\xstore.properties from a entrie(swa.pos.eft.pepper.IP_Address).

The problem is that if that key is blank in the xstore.properties the configure.bat does nothing :

#blank value

swa.pos.eft.pepper.IP_Address =

They want that it change the value to blank.

this is the portion of the prop-map.xml:

<prop name="swa.pos.eft.pepper.IP_Address"

    location="version1/authprocessor/pepper/system.properties"

    property="swa.pos.eft.pepper.IP_Address"