Requirements to use a blueprint file:
Have Buildcraft v3.x (SSP only version at time of writing)
Unzip blueprint files to:
../.minecraft/buildcraft/blueprints
add the exact name of the blueprint file (including the .bpt extension) to the entries in index.txt and also <your name>.list (the last one makes the blueprint accessible from the blueprint library block.
Place builder ingame
Create blueprint library block
create blueprint and load it with desired template
load blueprint into builder
change trousers after seeing iron requirements.
Profit.
The hangar should work fine at any rotation - it's all solid blocks, also the template was made with architect table outside the back left corner as you look in the door. Bit of a fail of placement there. Test it in creative first - you don't need to supply blocks in creative mode, just power.
The colony ship should be fine under rotation with the possible exception of the sticky pistons and machine facings - experiment!
EDIT: Added more blueprints to the zip file, some redpower items which might not work as intended.