How to use jit.op in gl stream?

I'm trying to process qt movies via GPU in order to optimize performance. I send the movies to [jit.qt.movie @adapt 1 @unique 1 @colormode uyvy] and then send them on to [jit.gl.slab @file cc.uyvy2rgba.lite.jxs @automatic 0 @dimscale 2. 1.], and then on to [jit.gl.videoplane @automatic 0 @transform_reset 2]. This stream moves on to jit.gl.render and out to a jit window.

It works great for one movie, but I would like to blend two movies via jit.op. Is there a way to include jit.op in this stream somehow?

Prior to trying this, I was running two movies into jit.op and out a jit window. I like the look, but there is stutter. I'm trying to improve performance, but I need to figure out how to use jit.op in a slab => videoplane context.

Context: Macbook Pro OSX 10.5.8 Intel Core 2 Duo, 4 Gig RAM, Ableton Live 8.2.2, MaxforLive 5.1.8.

Thanks.