To edit mig33 jar file you have to extract jar file and then edit the contents of it. To extract jar file you can use Winzip or Winrar. Winrar: install Winrar to your pc. Right click on the jar file and go to open with and choose Winrar archiver. Then you can edit the .png files with any graphics editor. Hope you can understand copy the MANIFEST.MF to your dekstop. Next open it with Notepad and change the marked parts to your own name! Replace the default file with your edited file! Your done, you have a (yourname)33. CONGRATS!