Are you sure that you need an alignment after changing the rack bushes? Seems like all they would affect is the toe, but they would affect it in equal parts, so if anything, it seems like you would just have to change the steering wheel position back to center. When I changed mine I noted no change in the steering wheel geometry, however.
They aren't that bad to install. Drivers side you just have to kinda snake into position. No special tools are necessary.