Very much like my Cavalier. I was lucky enough to not have to take the side pannels off. I slightly bent the rear deck cover up in the middle and pulled it out. It is made of some what flexable material and the edges extend only about 1/4" behind the side pannels. If you can bend it up enough without breaking it it should not be that big of a problem to pull it straight out. After the sides come out far enough, the seat belts will slide out the side slot. Mare sure any push pins or other types of fasteners that may be on the front side (between the top of the back seat and the rear deck) are removed.
2006 Jeep Liberty
Adire Audio, Cadence, Clarion, MB Quart
Lv = [(14630000 x R^2) / (Fb^2 x Vb)] - 1.463R
*Vb = vol. in cu"
**R = sq.rt. A / Pi (for square/slot port)