Thanks for your advice ladies. I agree, I think we'll all feel a bit calmer and work together better once it is just the 2 (well, 4) of us. I have spoken to DH about it now ... altho I was ranting at the time as there had been another cock up because he hadn't thought about the consequences of what he was doing with the girls .... but he did apologise and realise that (of course) I was right! 
Firawla - so sorry to hear about your poorly husband. I know appendicitis can be agonising - was it quite a traumatic admission to hospital? Horrible seeing someone you love in pain. Fingers crossed that the operation goes smoothly and he'll be back on his feet soon. Let us know how he gets on.
yukana - I agree with MrsV, newborns are a bit young to be sleep trained so you might find that this doesn't actually help her with a routine in the long run. I also read somewhere about how newborns not being comforted when they are crying can actually make them more anxious in the long term. I know the dilemma you're in well though - Sophia is almost exactly the same by the sounds of it. Tonight, for example, she has been up since her 11pm feed and has JUST settled back down - she had two enormous poos in the meantime and obviously had an uncomfortable stomach. This would have been completely unmanageable for me on my own as I was up all day yesterday and was quite busy, but DH stayed up with her until 3 and then woke me up to take over (just as Madeleine woke up too 
) is there any way your DP can help you out and work as a tag-team during the night, at least at the weekends? Are you managing to get any rest during the day - it might make staying up a bit longer at night more bearable
Hersetta - can't help with suggestions for constipation I'm afraid because you've mentioned all the ones I know (and some more... thanks for those!) I have also read, and seen a TV programme about cranial osteopathy for newborns and it sounds brilliant. It helps the plates of the head move into their correct positions and can instantly cure some babies who cry a lot. As Annie said - it is to correct the squidging that happens as babies travel down the birth canal. Might be worth a go for your little one? No idea how much it costs though but the woman on the programme had to take her baby a few times as it is gentle manipulation done over a few weeks rather than full-on head compressions (obviously!)
I'm up expressing at the mo. Much as I HATE doing it, it does give me a chance to catch up on here as I have mastered the art of balancing the sucker things whilst typing! Had a chat with DH tonight about quitting expressing though as it is so time consuming and, once all my helpers go home, I'm not sure that I will have the time to do it - particularly once the girls start sleeping a bit less. Madeleine can BF though so she could just transfer onto the boob all the time, but Sophia can't (altho I admit I could have tried harder to teach her) and I would feel awful if M continued to get my milk and S didn't. IMO, if one can't have breast milk then the other shouldn't either as it isn't really fair. Oh I don't know... another bloody heart-wrenching decision thanks to being a mother! Someone told me on Wednesday that babies don't get anything other than weight-gain from breastmilk after 6 weeks - anyone know if there is any truth in that? If so - I could happily justify FF after 6 weeks as they're piling on the weight with that stuff!
Sorry, epic post, I'll bugger off now!