REM Prior to Java 1.6 use -import instead of -importcert
keytool -importcert -file "C:\temp\Thawte Code Signing CA.cer" -alias thawtecodesigningca -trustcacerts -keystore "C:\Program Files\Java\jre1.6.0_07\lib\security\cacerts."

keytool -importcert -file "C:\temp\Thawte Code Signing CA.cer" -alias thawtecodesigningca -trustcacerts -keystore "J:\Program Files\java\jdk1.6.0_07\jre\lib\security\cacerts."