All I'm saying is your going to end up with a jerky movie. You already have made a jerky movie doing a straight conversion, I'm mearly suggesting trying the NTSC to PAL conversion as you may actually end up with a LESS jerky movie that what you already have. I have no idea how jerky your movie is, only you know that. If your looking for the an absolute error free conversion, then I would suggest you download another version of the AVI if there is one or leave it as an AVI.
I live in a PAL world and 1/3 of my movies are in NTSC format. They all play perfectly via my DVD Player. I trade a lot to the USA as well with my PAL movies and they also have no problems playing them. We live in a multi-standard world now.
There are 3 standard frame rates used for DVD/SVCD/VCD. They are 23.976fps and known as FILM. Then there is 25.0000 fps for PAL (& SECAM) and finally 29.96fps for NTSC. Anything that strays from these frame rates are not standard. Conversion to a STANDARD format like VCD, SVCD or DVD demands it be one of these fixed frame rates. Unfortunately an AVI can be made at any frame rate, any audio settings and any data rate. The world is full of absolute crap made DivX movie because the person making it were more interested in getting it out onto the Net first rather than spending the time making it properly. Have a look around for some of the Centropy released early theratre releases and compare the quality with what the other publishing groups were putting out. There is no comparison.
Max size of an AVI to fit onto a DVDR, arr how longs a piece of string? The size of the AVI is irrelavant, the length in Time and data rate use is all that counts.