The only issue that I have with lard is that it be fresh. If you live in an area where people buy it as a staple, great. If it is something that sits on the shelf a long time--I would avoid it.
Like rancid butter, off lard will ruin your pie.
Edited to add:
By the way, if you click on the squidoo link that is part of my signature and scroll down to pies, you will be able to click on Maida Heatter's pie dough instructions. She goes into detail and is very good.