Yeah, I already have subs synced (probably good enough) to the Grindhouse release, I was just wanting to know if it could be easily improved. The next version of Project Threepio will include a Perl script for re-syncing to other frame references, but it requires 1) the timecode relative to the NTSC GOUT where the change happens, and 2) the amount of change, with millisecond precision supported but not required, because, after all, it's just subtitles. Not sure this method will work for everyone, but it works for me. I already synced Puggo Grande using this script, and am now working on PSB.

How my off-the-cuff adjustments may relate to actual frame differences...well, your guess is as good as mine, but subtitles are very forgiving.