I don't have much experience with actually making a dvd from scratch... haven't ever run into a situation where I'd need it. But, from the screenshots, it looks as though you might have to switch from DVD-ROM (ISO) in your nero compilation, to DVD-ROM (UDF), or possibly DVD-ROM (UDF/ISO). Though, I don't know how that will affect compatibility with your standalone player.
To avoid that, you might go back into WinAVI, and see if there is a setting to limit the maximum file sizes created.
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