Hi Frank, Yes it is possible. There is a couple of ways of doing it. One way is check to see if a mulching kit is available at your local lawnmower shop, they will probably have to order it in for you. Another way is to take off the old blades and use them to match up the mounting holes and buy a set of mulching blades. After you put on the new blades cover up the discharge hole with a piece of tin. This will give you a mulching deck, it probably won't be quite as efficient as a kit, but it will work. Remember now that you have changed it over you can't let the grass get to long before you cut it.
Good Luck
JOHN @ RONA, September 2005