If I understand correctly, you want to sell tickets by other organisations. Yes it's possible to sell tickets on cash desk and e-shop parallel. It isn't problem. The shop works normal like VirtueMart store, but the ticket category have to have the VMeTicketFlyPage.tpl.
There is a view for cash desk sell (you can manage it via Joomla menu management in administration). Here you can check it on our demo site:
demo.tramin.artio.cz/joomla15/index.php?...ltickets&lang=en
You have to be logged in under the account which is added to some specific organisation (VMeTIcket administration -> organisations) and then you can sell those tickets, for which you have the permission (VMeTicket administration->tickets->permissions).
You can also use the Orders view to see orders of tickets, for which you have the permission.
If you sell the ticket, there is a pop-up window with PDF file, which can be printed. (tickets are containing barcodes, which are used for validity checking). It isn't necessary to send emails with download id. Customer gets the ticket on the cash desk. The cash desk sell is anonymous, so the download id should be sent to seller email, and I can't see any reason to do it.
There is a "Check Ticket" view for ticket checking.
I hope that I respond your questions, but when you have still some other questions, let ask me again.
with best regards, PeDu