Can Multiple Bezier Corners Be Converted in one go?

[BenGoble]

Hi,
I've just traced a plan of an area from a raster and want to use the newly traced buildings for a composited plan, but all the buildings are a bit bowed due to the corners all being bezier corners (i.e. the curve corners with handles). Now, I can convert each objects corners to standard corners using the pen tool and the Alt key, but this takes ages as I have to select each path and then work through the corners. Is there a simpler way to process all the corners of my paths at all???

Any help would be much olbiged!

Thanks

 

[BenGoble]

Solved my own problem with a plugin. Betterhandles does exactly this, and has some pretty decent options. sadly it has a really short trial limit