OT: ASA 8.3 NAT question

Sorry for the OT but I am banging my head in the documentation.

In ASA 8.3 and later is it possible to use object-groups to do standard
PAT? The documentation seems to make it seem so but I can't find any
examples. The examples all just use plain Objects (not object-groups). When
I try a similar syntax under Object groups I don't see the same options.

ASA(config-network-object)# nat ?

network-object mode commands/options:
  ( Open parenthesis for (<real_if_name>,<mapped_if_name>) pair where
           <real_if_name> is the prenat interface and <mapped_if_name> is
the
           postnat interface
  dynamic Specify NAT type as dynamic
  static Specify NAT type as static

ASA(config-network-object-group)# nat ?

configure mode commands/options:
  ( Open parenthesis for
(<internal_if_name>,<external_if_name>)
                  pair where <internal_if_name> is the Internal or prenat
                  interface and <external_if_name> is the External or
postnat
                  interface
  <1-2147483647> Position of NAT rule within before auto section
  after-auto Insert NAT rule after auto section
  source Source NAT parameters

What I am trying to do is PAT a bunch of different subnets into the same
external IP without having to create an object for each individual subnet.
The subnets aren't contiguous so I can't just use a bigger mask or a range.

Thank you,

-- 
Marc Abel
CCIE #35470
(Routing and Switching)
Blogs and organic groups at http://www.ccie.net