I did the crisco thing the first time around- but have never used it on my cast iron pans again. I wash them with water only, no soap, then dry them immediately by placing them on a hot burner until dry. Sometimes I wipe them with a little olive oil if they look like the need it, but mostly the oil I use when cooking in them seasons them.
There was a thread a while back on seasoning cast iron pans without using hydrogenated oils- do a search on cast iron and I'll bet you'll find it.
I love my cast iron pans- they live on the stove, I use them so much.