Found it there:http://pl.youtube.com/watch?v=z8gjyj...eature=related
Who don't want to watch the video:
0.Make backup of level
1.Open that level in hex editor.
2.There should be "LEVL" string somewhere in up of the file.
3.Modify the four bytes after "LEVL" to 00
4.Save
5.Open level in jcs
6.Password leave empty.
Have fun :]