'http://www.mysite.com/'
'https://shop.mysite.com/'
(Just an example of my setup)

I've tried installing on the 'https://shop.mysite.com' site but it keeps redirecting to 'http://'. I could install it on 'http://www.mysite.com/', but then how do I tell it where to go for 'https://'? Also, keep in mind that while both (thankfully) have access to the same database server, there are two totally different filesystems in place behind the scenes (i.e. 'https://shop.mysite.com/index.php' is NOT the same as 'http://www.mysite.com/index.php').