im starting to be afraid your babies are getting too big for the basinett thing. you have to get them out of there before they learn to roll over, if they are already rolling over, or have started to, get them out of there now before there is an accident.
as far as noise, its surprising that quiet is something that your babies need; most babies are used to noise because the womb is NOT a quiet place. you should never have to tiptoe around the house while they are sleeping. you should be able to do regular chores and carry on -
my son is 2 and we still use white noise/lullabies when he naps or is in bed. he sleeps in his crib in our room with us, my husband is a light sleeper and needs the white noise himself :P and its convenient for us to all be in the same room. its comforting too.
anyhow, try getting some sort of white noise or the cd that we have; for crying out loud. its got 8 tracks on it of different household/white noises. very good. we ended up finding it when my son was almost 3 months old - for 2 months we ran the vacuum at night. this cd has a vacuum recording on it - we ended up making a cd of 8 vacuum tracks. the tracks are around 9 minutes long each.
anyway,
try that. use night light (which im sure you do)
also remember that your babies are young, getting to be the age for teething, and doing a lot of growing in their first year, they are going to be hungry, A LOT.
bear with them.
i cant imagine having twins when one is such hard work, especially with the night feedings. you are a stay at home mom? thats a helpful thing for you anyway.
remember that they wont wake at night forever, its actually helpful that they do (prevents sids when they dont sleep too hard) and you might actually miss the nighttime connection when its gone. :D and the way you nurture them during the night now makes a TON of difference about how they feel about sleep and night time later.
:D
good luck,
www.askdrsears.com might have some help for you!