Aimed versus Immediate Attack

Okay, all you smart TME goons, how on earth have I missed this all this time?  In the hub rules, in the section covering ranged weapon attacks, it has a paragraph about called shots, aimed shots, and immediate attacks.  It implies that there are negative modifiers for immediate attacks (such as the second or third attack in a round using an automatic weapon like the automatic rifle), and that only the first, aimed shot gets the full regular SV.  But what exactly are those modifiers?  And what is the bonus if you are firing an aimed shot (one that takes two turns to accomplish due to aiming)?

Here's what I used last night in my game:

Aimed shot (not a called shot, just a careful aim): +30
Immediate attacks: -10

Any input/ideas/corrections/anything?

And where on Earth are the Expansion Rules!??!  Y'know, I don't live that far from Kamloops... I might sneak up there and steal his rough draft 'cos I can't wait anymore and it's making me Crazy!

LOL
Thanks in advance!
Tim