I have done a little investigation into the NVC file format,and I know a little more by comparing a few project files. Each clip is stored in the NVC as a 2E6 sized block the drive letter appears to occur at 3A0 + another occurance at an off set of +1A (3BA) 686 + 1A 96C C52 F38 ect drive letter D: is stored as BB and drive E: is stored as BA in the string 'part1' the '1' is stored as CE and if you change it to 'part2' the 2 is stored as CD. comparing these values against the ascii charactor set if you subtract CD from FF you get 32 hex which is Ascii 2 (the other digits I discovered fit this pattern as well :) however you cant just poke in new values as the project file appears to be check summed as it reports the file as corrupted if you do so. It looks like the bits are just inverted ascii 00110001 is ascii '1' in the file it is stored as 11001110 or CE in hex anyone know of a tool to flip all the bits in a file :) regards John