Some cards don't like connecting with a fake mac. Mine does not: which is a shame. But in the case yours does, as long as the interface you've changed the MAC on is the one you're connecting with, it should register with the AP as the MAC it's been changed to.
You should consider learning Linux before you tackle BT4; I've already gotten 70 pages into an online book and it's saving me a ton of grief (why in the world was I poking around in the X11 directory before?). I also gained a lot of respect for the work put into the BT4 distro.
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