[Howto change the path (manually):

1.) Take a decrypted vshmain.prx and open it in your HexEditor
2.) search for flash0:/vsh/resource/01-12.bmp
3.) replace it with flash1:/vsh/theme/01-12.bmp (fill the rest of the old path with 0x00)
4.) flash the new vshmain.prx and 01-12.bmp (decrypt the vshmain.prx to maximize compatibillity)
Done!