how do i take this off with out screwing it up?

mines pretty good and all but i took my head liner out to re-upholster it (for another post tommorow) and i found a small leak because some one didnt know how to install a window.
needless to say it caused some rust but its nothing major, i would like to put a stop to it though while i have the headliner out.

 

not sure, lol, ive failed at doing that. i believe the process though, is you see the corners, they are small seperate pieces, i believe those pop out then the long chrome strips slide out....

 

Remove A-pillar rubber molding, remove phillips screws for trim pieces, remove trim. Then you can slide the top and bottom trim out from either the left or right side. PULL, DON'T LIFT.... unless you like bent chrome.

 

alright i got it off but it streched out some so i donno, either way i quick patched some rust gooped up areas it apeared could be leakin and stuck it back on.

it'll atleast keep the rust from gettin any worse untill the summer, it wasnt too bad all in all