Dorothy,
I recently bought a B2 Speedex, and its a wonderfull camera. The front lens element should be easy to screw off: just take those 2 tiny screws in the focus scale out, take out the focus scale, and screw out the lenses (might come out in a pair, might come out one at a time). This is how I "opened up" my Agfa Jsolette V, which looks very similar to my B2 Speedex.
The rear lens (and the shutter, I think), should come out by unscrewing the jam nut (or retainer ring, whatever its called) from inside the bellows. Very much like a large format lens.
I think I bought my jam nut tools (I can't remember what they are called) from microtools.com or something like that.
BTW, it's worth checking the focus of the camera with a ground glass on the film plane, and either re-adjusting the focus scale (which you will have to do if you take it out, its just a matter of putting it back in the right position), or taking notes on which marked distance is which distance in reality. I did the later, and my camera can focus from 0.8 m (marked 1 meter) to 3.22 m (marked infinity).
Here's a couple of examples of what the lens in that camera is capable of (these are quick scans of RC prints, so both shadows and highlights may be blocked up). The garage shot was after I checked the focus, the portrait is from before (the focus ended up being on or before her shoulder).
Good luck, and take care.
André