Hi Jeff, 

There are a couple ways you could do this. As you stated, you could have a workflow business process set up to invoke a Forms process with information about the selected entry. That way you could have a button in the repository to start the process.

Another option you have in web client 10.2 is to use custom tabs to embed a Laserfiche form alongside a document/folder. Based on which document is selected you can use URL parameters to fill your form with the entry ID of the document as well as other tokens.

The only thing I'm unclear about is what you mean by "launch the entry in a Form." Do you mean embedding the actual document an iFrame on the Form? Or just grabbing the information about the entry for use in the Forms process?