Forcing XCode to Java 1.4

Dear List,
I have followed the developer instructions here 
http://docs.info.apple.com/article.html?artnum=75505 for forcing XCode to 
use Java 1.4 but jars I create still say Created By 1.5.0_06 in the 
MANIFEST.MF within the created jar. I also tried some other instructions I 
found on this list where the main target is edited to set Java Compiler 
Settings, Target VM version and Source Version to 1.4. Still I see 1.5 in 
the created jar. Has anyone else had trouble switching back to 1.4? I even 
tried rebooting to ensure all settings were permanently in place.
Thanks, John