Wayne,

....Be sure there's adequate header over the new door installation...

may not have been built to modern standards,
so that the header size should be checked

We just finished building the house a few months ago. The 4' window is in a
load bearing wall and is supported by a header built of two 2x10's. Plenty
strong enough.

I'm just looking at different options for putting a door where that window
is.

Anthony