I didn't use this kind of scanner yet. But according to my experience HP Scanner isn't bad.
If you have not already resolved this issue, we suggest you search our online knowledgebase for this product: WorkCentre 7855.
Alternatively, you can visit our Contact Us page for other support options.
I have set up a workflow scanning template to scan to a SMB share. We added a workflow tag so that when the start the process they are prompted for a value - student ID. We want to use this value in the "document name" field so when it is saved the file is named the student's ID. I would think you should be able to use the tags somewhere in the workflow process.