ADD-ON: just tested, this is really THE TOOL !

1) to delete undeletable/protected file, e.g. ringtone 'Bulls Eye.mp3', write script
   deletefile:/tpa/user/audio/Ringtones/Bulls Eye.mp3

2) to add new funny frame for camera
- create 320x240 PNG file and save it, e.g. as Wanted.png in D:
- write script
   d:\wanted.png
   /tpa/preset/system/multimedia/pe/frames/Wanted.png

for other options, see SETOOL2 manual, great

btw: to restore original java certificates in settings - connectivity - internet settings - security - java certificate (Utiroot.cer, ThawtePremium.der, VeriSignClass3Root.cer) that are missing after finalizing with sonics, copy them into /tpa/preset/custom/ in phone memory (by writing script in setool) and do master reset. doing master reset is really needed, because new certificates have to be processed by phone (passed into /tpa/preset/system/security/swim/java/cdf_trusted/ etc.).
this is also the way how to add own java certificate into phone. but don't forget, you have to edit customize.xml.