So I added another approach of having external/seperate subtitle files, so rather than the burnt in subs I had the seperate IDX/SUB files, trouble is, these can be quite massive and the avi size needs amending if you were to say, do a 1 CD convert and the size amendment can be quite significant. That's all great as I then burn them directly into the AVI during the encode. I'm using the command-line of VobSub, which I find excellent, to make an IDX/SUB and refernce it from my AVS file via my program. I had a look at the 'CLI' file, tried, but couldn't really get it to work which is down to me, I just got a bit dis-heartened with it all. I had a look at subrip and I must say I wasn't very impressed, though that's probably down to my lack of knowledge on that program.