removing 6ft sliding door

My pocket door that have is rubbing against the sides of the jamb and are scratching off some of the wood on the bottom half of the door. I need to trim about 1/4" at most off of one side of the jamb but don't know how to do this. Removing the pocket door is difficult.........I know it hangs on hinges but can't seem to find them. I also have to trim about 1/4" off the bottom of the door since it's also rubbing against the new thicker carpet we've recently intalled. I think I'm in big trouble here.

I have an older house. The windows were replaced a while ago in the old casings (looks like just new sliding windows/metal frames screwed into the old casings, they never leak and work fine). I have one external window sill that is dry-rotted and needs to be repaired or replaced. It looks as though the outer edge only up to the wall line is affected. Should I cut this out and patch, lop off the whole front of the sill from side to side and replace (Too tight for a skill saw), or will I need to replace the entile sill, which I think means dismantling the window, maybe I could simply remove and replace the sill without disturbing the rest of the frame (I would need to pull out the window and metal frame). Any ideas on how to best approach this project?