I have patched a rom for my next gen
this is what the software wrote on the screen when i did the patch
Updating ROM versioning and checksum...
Writing output file: TREK_L8.ROM
Updated ROM file write complete.
Validating Updated ROM file...
Updated ROM Validation Passed!
Rom Info
--------
File: TREK_LX7.ROM
Size: 4 M-bits (512K-Bytes)
Checksum Valid: e808
System Version: 3.8
Game Version (Old format): L(x)-8
System ROM Offset: 00078000
---------------------------
Done.
C:\>wpclp TREK_LX7.ROM TREK_L8.ROM
Now to burn it onto a rom & see if it works in my next gen.
By the way it is a dos based program. i had to open a command prompt and type crap in but the software came with a read me file explaining how to use it.