asterisk users - Nov 2010 - CDR Billing issues

Hi
     I am using asterisk 1.6.1.1 ,and trying to do cdr billing.But the 
problem is when I do transfers,callforward,callparking cdr records are 
not proper.Below is example

     'A' called pstn number and 'A' transfer the call to
'B',In this
case cdr is genrating as

     1 . caller - A ,Callee - PSTN ,uniqueid=923479129.234

     2.  Caller -A , Callee -C uniqueid = 939389037.343

There is no link between these 2 records,and I need to generating bill 
to user A for PSTN call using both records . how do I link these two 
records? .Same type of records are creating when we do forward,call 
parking , Anyone have a solution on this. And anyone knows how to use 
accoutcode and amaflags to solve this problem.

Thanks
Nikhil.