For the rtcs (which have pins on only one end) that shouldn't be to hard, for instance pcb is already done (if you ignore the silkscreen) as the pins are already inline (you would need a right angle .1 header to physically mount it though) If you also want breadboard you would have to modify the breadboard svg file which is likely to be a fair bit more exciting (or the pcb svg to modify the silkscreen). Modules with two rows of pins probably aren't going to work though.
Peter