ok, i set up a machine.
a duplicator constantly fills an ender chest with rift signatures.
on my machine, a counter ticks off 30 beats of the timer that runs the caterpillar drive.
the counter resets itself (positive out to negative count in, count down by 100, count up by 1s to 30), sets off a delay (rs latch attached to the side of a timer so the timer sends one pulse after 3 seconds) which pauses the timer running the caterpillar drive, and triggers a filter to take a rift signature from the ender chest and send it to a deployer.
the same pulse activates the deployer (pointing up into an empty area), and saves the rift. a delay on the pulse triggers another filter to pull the half used rift signature into a second ender chest.
the second ender chest has a clock attached, that pulls any items in the chest out, through an item detector, and into a deployer.
the item detector detects a rift signature passing through, and activates 4 items.
first, a block breaker above the door breaks the door
then, the deployer is activated, forming a complete rift, the rift signature is used up.
a new warp door is placed by a deployer at ground level, behind the rift, so that the door appears on the rift. there is an active lever next to the door, so it opens
finally, some sugar is fired through the door to try to force the door to appear on the other side. this may be totally unnecessary.
every cycle, the previous cycle's rift signature is activated, meaning a new floating door appears about 30 blocks (due to my timing) behind the machine every 30 blocks (or so)
only the last door should be bound to the rift in your base, but there will be a string of doors following the machine around. you may wish to make the machine build a road for you as well, leading from the doors, if you are in survival.
i shall continue to experiment, and see what steps i can drop.
@Gorian ah, i see, is there an equivalent to the deployer?
i have kept my server as tekkit lite solely because redpower 2 is so useful. without it, i would practically have no base left as most of my factory is redpower2. not much help to you, just some unnecessary background :-)