As far as I know all vauxhall's(not sure on newest models) need a security code to access the immobiliser programming functions although vaux-com will extract some but in the main a code Is needed.

So basically without a code I don't see how you will add keys with either vaux-com or tech 2.

I even believe Vauxhall have now tightened up on releasing codes unless a v5 document and identification is supplied so the use of 2nd hand ecu's is difficult if they haven't been reset before removal.

That's why specialists in this field are good to know and worth there money.