There are several tools that can be used to do bulk imports into Laserfiche; the two most common tools would be Import Agent and Quick Fields.  Quick Fields has a lot of built in flexibility for zone OCR, reverse lookup into databases for metadata, image manipulation, etc.  Import Agent will also allow for bulk imports but with less flexibility on metadata assignment. 

You can also use Workflow for document manipulation and metadata assignment once the documents have been imported.  For example you can easily do metadata assignments with workflow if you use a document naming syntax on import that will allow you to parse out a unique key for the reverse lookup.

Your best bet is to partner with your VAR to look at all of the options available to you as it can be a bit overwhelming at first.

Finally, as a Laserfiche PDP (Professional Developer Partner) my fallback position is that we can always write a quick on-boarding utility that will do exactly what you need it to do if you cannot accomplish what you need to do with all of the other tools!