My father had an XM V6 too, the station wagon, 12 valves 170hp, bought in 1992. A very good car with a comfort and an handling exceptionnals. He had also some CX but I don't remember, I was too young.
To post a picture, go to "Gallery" (on the top of the page, between "Forums" and "Articles"). The login if it's not done (top right of the page). Then click on "Upload photos" and finally, when it's done, you copy the link and you paste it in your message.
Very boring to do but quite easy. Give attention to the size of your photo, if it is too big, you will have to resize it smaller.
Good luck btw !