Your link is now dead for me, but it sounds like you want to adjust the rest-pose roll of your bones.
The best way to do this for multiple bones at once is to use the recalculate roll operation (ctrl n in edit mode for me), which can work on any number of bones at once. You'll see a number of options to set these to attempt to align to global axes, or to tangent axes (which requires that the bones have children.) There's also the option to point the Z axis of the bones at the cursor.
Another way to adjust roll is in pose mode. You can rotate a bone in pose mode, then ctrl-a (apply) -> apply selected as rest pose to adjust the roll of a bone. Unfortunately, even individual origins uses a median axis for the bones, so this isn't necessarily a great way to adjust the bone rolls of multiple bones at once.