[villagetinker]

Taltarzac725,

Hubby should be able to do this. Place cardboard, a piece of plywood, see if you can borrow a piece, and finally, a moving blanket or similar over the glass topped stove. A second piece of plywood would really provide protection if placed on top of the blanket. Look at the instruction manual for the existing microwave, it should have mounting instructions so hubby will be prepared. You will probably not be able to measure the duct work until the microwave has been removed, so plan on one trip to the local hardware for the additional duct, and for the microwave to take 2 days. You may want to have an old towel handy to block the vent until ready to re-install the microwave. Also, if possible check to see if the microware plugs in (this is what I would expect) so you should not have the have the receptacle moved.
Also, when you get the wood to fill-in for the gap at the top, you may want 2 additional pieces for the bottom sides of the microwave, as these will now be visible.

Tell Hubby good luck.