It looks like a bolete of some sort. I have like 50 of those growing in a local forest near my house....the ones with the yellow pores. Getting an exact id on boletes can be a very hard thing to do....even harder when they are old.
Look up boletus genus and you may be able to help find what they are exactly.
This may help out:
http://www.mushroomexpert.com/boletales.html http://www.mushroomexpert.com/boletus.html