Yup, I was never in a car seat, and we laid across the back seat to read/sleep on long trips, sometimes in the floor! DH is from outside the us and had never seen a car seat until we purchased one for DS. We had a neighbor help us to instal it & a nurse at the hospital show us the proper way for DS to sit. Funny story, when DS was 3 weeks, DH called the ped to make sure it was safe for him to ride in the seat for an extended period, as he didn't think it looked "safe" for his stomach/back in that pumpkin seat position! They had a little chuckle at our expense ;-)
Sorry if I haven't gotten back with anyone via PM. Still learning the iPhone app and not very "techy".