Hi ChrisF,
I am on WIN7 X64 machine
I followed all the instructions including rebooting. Also edited the PATH variable to include the correct path to JDK Java_Path = "C:\Program Files (x86)\Java\jdk1.6.0_20\bin"
I still get the same error message:

ERROR: Cannot verify file signature. This is likely a problem with APKtool.

Jun 15, 2010 11:34:00 PM brut.androlib.Androlib buildSourcesSmali
INFO: Smaling...
Jun 15, 2010 11:34:05 PM brut.androlib.Androlib buildResourcesFull
INFO: Building resources...
Jun 15, 2010 11:34:07 PM brut.androlib.Androlib buildApk
INFO: Building apk file...
'jarsigner' is not recognized as an internal or external command,
operable program or batch file.
'jarsigner' is not recognized as an internal or external command,
operable program or batch file.
Unable to open 'Apps\ASL\dist\Rebuilt.apk' as zip archive

C:\Users\-\Desktop\Android apk full screen converter\AppsDecoder_1-2>echo Building and signing App ASL.apk
Building and signing App ASL.apk

C:\Users\-\Desktop\Android apk full screen converter\AppsDecoder_1-2>cd /D C:\Users\Prasad Joshi\Desktop\Android apk full screen converter\AppsDecoder_1-2

C:\Users\-\Desktop\Android apk full screen converter\AppsDecoder_1-2>java -jar apktool.jar -v b -f "Apps\ASL"

C:\Users\-\Desktop\Android apk full screen converter\AppsDecoder_1-2>jarsigner -keystore eDGe.keystore -storePass eDGe12 -keypass eDGe12 -signedjar "Apps\ASL\dist\Rebuilt.apk" "Apps\ASL\dist\out.apk" eDGe

C:\Users\-\Desktop\Android apk full screen converter\AppsDecoder_1-2>jarsigner -verify "Apps\ASL\dist\Rebuilt.apk"

C:\Users\-\Desktop\Android apk full screen converter\AppsDecoder_1-2>zipalign -f 4 "Apps\ASL\dist\Rebuilt.apk" "RebuiltApps\ASL_INSTALL.apk"

C:\Users\-\Desktop\Android apk full screen converter\AppsDecoder_1-2>


Your help will be much appreciated