Some/Most D-VHS Recorders will record D-VHS onto a standard "unpunched" S-VHS tape by simply pressing the "D-VHS" button prior to making a D-VHS recording---but it's easy to forget (resulting in a standard S-VHS recording) and it takes much longer for the recorder to recognize that it's a D-VHS recording rather than S-VHS.
The Keoki article described how you can modify the insides of the recorder so that the SVHS/DVHS recognition pin is permanently disabled in the D-VHS position....begging the question on how you make an S-VHS/VHS recordings...
But I've found that it is much easier to simply punch a D-VHS recognition hole into an S-VHS cassette, matching the S-VHS recognition hole on the other side. For this purpose, I use a medium sized needle nosed pliers and simply measure over the right amount from the edge and firmly punch in a hole--the insides of the Fuji "Red Box" S-VHS tapes are already half-way punched so it's easy.
I buy boxes of ST-120 and ST-160 tapes from
www.tapewarehouse.com
Since most S-VHS tapes will not work reliably, check the D-VHS threads on which S-VHS tapes will work: such as Fuji Red Box and Maxell Black Box tapes....and many people use "slightly used" tapes...
A D-VHS recorder needs to be fed via an IEEE-1394 Firewire interface from an STB/DVR in order to make SD/HD recordings--but if Verizon hasn't messed up the copy protect bits, the HDCP "5C" copy protect built into D-VHS Recorders should permit you to record nearly anything on FiOS (except perhaps PPV).