Can one check out using a "purchase order" instead of the default methods?

[rhinopm]

I have a customer who would like their "wholesale" shopper group to NOT be able to check out via PayPal or Authorize.net as their retail shopper group can, but instead, generate and email a purchase order so that the wholesale orders can be processed manually.  I have searched all day for an answer... I know "purchase order" was an option of the older versions, but cannot find it on VM2.  HALP!

[jenkinhill]

Of course it can be done, it does not need a separate plugin.  See http://forum.virtuemart.net/index.php?topic=115108.msg387778#msg387778