Attach a pdf to payables transaction in MS Dynamics GP 2010

Hello, my boss just assigned me with the task of figuring out if it is possible to attach pdf files to payables transactions while I am entering invoices. I was able to google some instruction, but they seem to be for a different version. These are the instructions I found

http://dynamicsconfessions.blogspot.com/2010/07/attaching-pdf-file-to-payables.html , but like I said, they don't work on the version I have. 

Does anyone know how to do this on Microsoft Dynamics GP 2010?

Thanks,

Hanre