Do some research before you tackle that job Ez. I've heard it's worth paying a reputable shop the $50 they'll probably charge for labor. Also some places will try to sell you the right plugs with the wrong gap. Make sure the NGK (I think it's NGK) part number doesn't have a "-11" at the end of it. Some other stuff I remember reading are, it's easier if you remove the battery...use anti-sieze on the threads, but subtract a few foot pounds from the factory torque specs on them or you can strip the threads in the block very easily.
I haven't read it, but here's the DIY:
http://www.scoobymods.com/forums/showthread.php?t=1596