and stock footage are entirely different beasts. They aren't constructed the same, they aren't used the same, and they don't work the same way. Presets are made up of settings for various controls of the engines within EffectsLab, whereas stock footage is nothing more than video.
To remove white backgrounds from stock footage, you need to set the Composite Blend Mode to Multiply. This can't be done in EffectsLab. Also, please try to keep support questions in the proper support forums. Thanks. I've moved this one for you.
Last edited Thu, 21st May 2009, 9:15pm; edited 1 times in total.