So I have an Aerostar cargo van. A down side of this over the passenger model is that the only opening windows are on the front doors. There is a window on the sliding door, but it doesn't open.<br><img rel="lightbox" src="http://imgc.classistatic.com/cps/poc/121212/627r1/0315ebf_27.jpeg" class="bbc_img"><br><br><br>So I'm thinking about switching it with one from a passenger model. Around here we have a place called Pull-A-Part. They list sliding widows at $40 and, of course, you pull it yourself.<br><br>From the inside of my window (since there is no plastic around it) it seems pretty easy to pull and switch. Seems that basically one would remove about 10 nuts and take it off, switch 'em out, and put the nuts back on. <br><br>What I need to know: Is it really that simple? Do I need something to seal the new window in place? What am I missing?<br><br>THANKS!