heatercore replacement

I have searched these forums for a how to replace heatercore on a '87 Honda Accord and had no luck. I bought a new heatercore and I was told that the dash has to come out to do this. How hard is this? Can anybody walk me through this? thanx

http://repo.jackmoves.com/album228?page=1

this link should help out....the best walk through i could find....have fun