The vinyl window in our bathroom has been leaking since we bought the house. THe glass panes leak so there's mold spores in between them. Is replacing this unit as simple as just removing it, cleaning the surfaces, then 100% silicone caulk bead, and reinstall the new one? Odd size too - 31 5/8 x 44 3/4. This is just a regular cookie cutter 1966 house in a neighborhood. I was hoping I'd be able to just go get one at Home Depot or Lowes. Especially being that the one that's in there now looks like an American Craftsman.

Thanks in advance for any advice. I have a bath closet open from floor to ceiling, 8 feet. I want to close it in at the top and go with a standard 80 inch door. It used to have a floor to ceiling plywood door I am replacing. The stud framing for the closet are turned sideways. Any suggestions for how to frame it in at the top and for securing a standard size solid wood core door to studs turned sideways (only 1.5" of wood facing the door frame). Since it is just a closet door it won't be getting a lot of heavy use. I figure if I am careful where I nail, I should be OK. Pix are attached showing the hole for the closet and the framing for the closet. Again, thanks for any advice.