3 Carseats in a Hyundai??

Hello all, It has been quite a while since I've posted here. Great to see the forums still getting plenty of use. Apologies if I have posted this in the wrong spot.

We have a 3yo daughter who is in a booster seat with harness, a 1yo son who is in a carseat, and have just found out that #3 is on the way...due to arrive in March 09.
Currently we have a 97 Hyundai Sonata and are wondering if we have any chance of fitting 3 seats in the back. Does anyone know of a combination that works well in the Sonata. Initially we'll be looking at booster seat, carseat, capsule. Looking at the space currently there I can't see them all fitting :(

Hopefully, if all goes well, by the time #3 arrives we will have a commodore station wagon, which will give us a bit more space to play with (any recommendations for seat combinations to suit here?) But we will still have the Hyundai so if there is a way we can make it work that would be helpful.

I hear the Safe & Sound Compaq is fairly slimline, are there any others worth looking at?

Hope you can help.

Mark