95% sure kramayak thiyenava.
but eka secret ekak.
eka nisa denna vidiyak naha.
naththam podi podi krama thiyenava. meka poddak hinayana vadak.
habai cd godakatanam karanna amaru vei
menna ekak.
1. burn your wanted files to CD with multi sessions. (but leave 50 - 100 MB for protecting)
2. now burn unwanted File like video file. rename it for like "system.dll" or "setup.dll" like that before you write
3. after CD finished make scratch on ending point of the CD.
careful don't scratch in your data session.
now it was protected.
if some one try to make copy or try to copy to HDD, it will show you it have read error.
have fun.