Hello. I also have the PV-GS39. I had the same problem as you have, here is what I DID to resolve my problem.
1.Go to: http://www2.panasonic.com/consumer-electronics/support/Cameras-Camcorders/Camcorders/MiniDV-Camcorders/Drivers-Downloads/model.PV-GS39.D
the above link will take you RIGHT to the web page to download the PV-GS39 Software & Drivers that YOU WILL HAVE TO HAVE. But if you have WINDOWS VISTA then you can use the WINDOWS MOVIE MAKER software that is ALREADY PRE-INSTALLED on your PC then you will NOT have to download the software from the above link.
2. You HAVE TO have a: FIREWIRE IEEE 1394 PCMCIA NOTEBOOK CARD. I got mine at: Best Buy for: $53.86 with taxes. the name of this card is: DYNEX FIREWIRE IEEE 1394 PCMCIA NOTEBOOK CARD.
3. You ALSO hae to buy the CORD that connects to the PV-GS39 and the DYNEX FIREWIRE IEEE 1394 PCMCIA NOTEBOOK CARD, the cord costs $36.79 ALSO at Best Buy.
I did ALL 3 of the above and now I'm copying my movies and videos from my tape in my camcorder onto my PC and BURNING the video onto DVD/CD Disks.
If you have any questions, you can email me at: email@example.com
Rick D. Michaels