Parallel Port Scanner (Score 1)

I have a HP1100A Laser Printer / Copier / Scanner which uses the parallel port under ECP operations. I have noticed that a> ECP is not presently supported under Linux (EPP is under source code /linux/drivers/scsi/ppa.[hc]) which is the basis for the Zip drivers etc; b> SANE indicate that parallel porting is not supported; So I am trying to see (don't hold your breath) if I can get my HP scanner working by reverse engineering the Win95/HP protocol for scanning a page. I am presently considering the best means of intercepting the protocol between scanner and ECP port by possibly using some type of ECP sniffer under Linux (via an addtional ECP port on my machine). I am seeking helpful comments on how to do this, noting that I have the IEEE-1284 Extended Capabilities Port info, some basis source code from Linux drivers and THE WILL to positively add value to the Linux community ?