Typically, if the computer completely freaks out, and thinks the transmission is failing (this procedure will not make it happy I bet), then I believe it will set a trouble code, check engine light, and at worst, cause the vehicle to go to limp home mode. If that happens, I believe you will need to restart once it gets out of the driveway, but on the restart, you should be home free I believe. Codes can usually be cleared by a code reader, or by disconnecting the battery. Code readers can be had cheaply enough, so that is not too much of a concern. The codes may show up in history when scanned, but once you recognize which codes it sets, I think you will be able to manage.
Keep in mind though, I am a series 1 guy with OBD 1, so I am not an expert in the field, but I wouldn't be worried about it based on what I know.