AWOL:
pinMode(10, HIGH);
pinMode(4, LOW);
Did you mean to use digitalWrite?
Darn!
Yes.
Thank you!
And I also realize that setting the pin HIGH actually disables it.
I turns out that all I need to do is disable the shield's SPI with digitalWrite(10, HIGH); so that the SD card can be initialized. Found it on a post on these forum.
After that it appears I don't need to do anything else.