Hi Roman, thanks as always for the kick ass app. If you happen to be poking around the header detector code, I had another request. I am looking into another music set, specifically MDX files. The translated spec can be found in here: http://www.vorc.org/forum/viewtopic.php?pid=453 . Basically, I would like to be able to read up until the hex string 0x0D + 0x0A + 0x1A (0d0a1a) is encountered, and skip everything before and including the trailing string, for checksum calculation. I realize this could be done by creating 1024 rules (what I believe to be the max length for the 'song title' field), but was hoping for a more elegant solution. Any ideas are appreciated if I have missed a way to do this with the current format. Thanks again.