I have a psp slim 2001 with cfw 5.50 gen-d3. Trying to update to 6.20 ofw.. I read around the forums and saw where i needed to change the release in the vsh menu in notepad.. Did that.. Changed the 9.99 to 5.50 and saved. When running the 6.20 update now it acts like its going to work goes to the white screen with psp on it then nothing.. Just sits there till i reset. Any suggestions as what to do? Keep in mind I do not have a pandora's battery.. Thanks..