self made protection -> read defect sector and run...

[cdkiller]

hello,

now i tried to made my own protection.

at this time i have a program which have a 255 char long string filled with "aaaaaaaaa"
after the creation of the bin file i have opened it in a hex editor and change the string to fffff which creates defect sectors.

ut also my program doesn't start after i load the image. i also can not copy it to the hdd or edit it with a hex editor.

so my idea is now, i write a modul which loads my programm and read the defect errors and correct its back into the aaaaaa form.

will it run or not or can i do it ?

the problem is also that i cannot change the ffff string in a hex editor into an aaatring because then he cannot read the file and breaks.

how can i read this ?

thanks