Animal (dead?) smell in air vents, Honda Accord '97 -- Urgent - Expert Advice most welcome

Keith – Thank you for your input.

Some other questions: where is the cowl you mentioned? Would like to cover the air vent as you suggested.

I usually keep the air vents on “inside air” because I cannot tolerate the smells of exhaust et. al. which inevitably enter when the vents are open. But I will remember to switch them to open position when I park from now on.

They discovered that the AC was broken because I was not getting any cold air from the lower vents, and very little from the upper, and I asked them to check. They found a leak in the compressor, and said the fluid was going through several parts of it which it isn’t supposed to do, and it also needs a new receiver.

Is there a way I can get a diagram of how all this is put together (especially the air circulation system)? Also, is there a way I could personally take out the vent “shades”, the things that regulate where the air is sent, that is part of the dash?

Thanks in advance for taking the time to respond.