Can you manually create invoices within Store Manager?

I process orders outsides of my Magento store, and would like to be able to create invoices within Store Manager, primarily to keep track of inventory.

I want to find a way to manually create an invoice, for a customer in my database or not, doesn't matter to me. I am trying to avoid having to go to magento admin panel at all, but right now it seems my only option to process pick ups and non-website orders is to manually log into admin panel on magento and create an order for a customer myself(while adding check as payment method to complete order).

Seems like the only thing that is missing from this program...any help?