Blueprints, I have no idea.
For moving to another world, though (I assume another savegame, not dimension - enderchests would probably work better and be less cheaty for that) you can empty your inventory and go into NEI's cheat mode. There, you can save 7 inventories worth of items as presets to be loaded later. once you save those 7 inventories of items, go to the other world and load them up, dumping the contents into a chest (or just putting them down somewhere, doesn't really matter) and deleting the preset, and then repeat until everything is moved over.
Builders (and blueprints) have been disabled from BC until they can be fixed (although its been over 4 months now, now sure they are even working on trying to fix it).
Currently, they crash clients and servers and corrupt the game as the game/server crashes on load when it happens. Very very bad bug.
Wait, Enderchests save across worlds ?
I thought they could only transfer across dimensions, may give that a shot.
I don't mind the NEI "cheaty" way either, I personally don't see it as cheaty unless I give myself extra items.
Really?
That's odd, I've been using them left and right for months now and only once did I have a really bad problem, that was almost when I started FTB and even then I was able to fix it.
Oh well, that's a real shame, wish they could have at least left it in creative only, at the user's own risk, they're really helpful in building and moving large buildings.
They weren't perfect, but they were a lot better than doing it all by hand.
I think when he was talking about enderchests he was talking about using those across dimensions.
I'd have to say if you're wanting to go to a different world via Mystcraft then just use enderchests/enderpouches.
For moving to another world, though (I assume another savegame, not dimension - enderchests would probably work better and be less cheaty for that.
For some reason, they were only broken in SMP (they worked mostly fine in SSP, probably broken if you enabled LAN mode but idk).[quote about blueprints/etc being broken here]
Really?
That's odd, I've been using them left and right for months now and only once did I have a really bad problem, that was almost when I started FTB and even then I was able to fix it.