Method 1:
I recommend you get a video capture card and hook up your VCR to it & transfer files to either VCD, SVCD, DVD, DivX or whatever your preference.
Depending on what format you want to use, you will need different software & hardware.
-Recommend AverMedia or Aveosis capture cards.
-Software that comes with them or VirtualDub, PowerVCR, few others to capture.
-CDRW, DVD-R/+R drive to burn them to CD/DVD
-software for burning (your choice but the forum discusses a few)
Method 2:
If these Tapes of yours can be played back by a Camcorder that allows for USB/Firewire or other hook-ups with software to transfer you videos to the PC. Sony allows for hi-fi8 tapes & DV. I don't know if you can find one for your type of tapes.
I think those are the best methods/choices you have.
If you have questions or whatever, just go ahead & post.
Myself (whenever I have time) or someone else will try to answer you posts & hopefully get you started on the right track.
Good luck