try

File> export> windows media

this will compress your video using the wmv codec, you'll have a much smaller file size. You'll have to experiment with the settings a bit to get the best quality vs size, but you'll be able to get it undr 25 MB no problem (assuming it's only a few minutes long max).

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P4 1GB Ram 50+160GB, Win XP, Premiere 6, Encore+Photoshop, Lite-on 4x dvd rw.
Sony TRV-250, Panasonic NVGS-75, Canon MV600i