Hi mate, check xbox-scene forums 'reset glitch hack' post. There is a link to a different python build. Like you i was tearing my hair out trying to get the glitch to work on a jasper 512mb. Used this and xell booted straight away. I used the dangerous prototypes coolrunner II board though. Just check the last few pages and you will find the post with the link to the file. Good luck matey.