I've seen it done many times and assisted a couple of times. I removed my screen easily enough one-handed.
Put several blankets or layers of bubble wrap on the bonnet.
Remove the old plastic trim and bin. (keep the joint hider if in good nick).
Very carefully and slowly (in the sunshine on a warm day or heat the rubber with a hair dryer) start pushing the screen out from inside the car - try lots of places/all corners until a weak spot is found and work slowly from there. Be careful, take it easy. Force is required, but steady and no sudden movements. Eventually the seal will start to give, near the end it will go quite quickly, hence the blankets or bubble wrap.
Remove the dash vents.
Use paracord or electrical wire to fit the new screen and seal....two people required.
Fit the seal to the screen, wrap the cord around the inside of the seal, with the cross-over of the cord at the bottom.
Place the screen and seal over the opening, ENSURE it is absolutely central!
From inside the car start pulling the cord, one end at a time, using a wiggling motion and taking care not to split the new rubber. Some people use lube on the cord prior to this, and some use sealant in the groove (messy but probably best). The other person needs to push on the screen as in CPR movements!
Once the new screen is in, poke, prod, push the seal to ensure it's correctly seated.
Put sealant under the edges of the screen rubber.
Using some lube fit your new trim.
This works for me, hopefully others can throw in their tuppence worth and you can decide what might best work for you.
Search youtube!
