I am not an expert but I would say that you can tell that a rip is from a VHS source if the aspect ratio is 4:3 and the qualty is bad (much noise and blurry image). While this is also true for some DVD rips those are most likely VHS to DVD transfers, which might also belong into the VHS category.
You have different possibilities to burn a rip onto a CD-r:
- create a Video-CD / SVideo-CD (the rip needs to be mpeg-1 / mpeg-2 encoded - playable with ALMOST ALL standalones)
- create a Data CD with the video file on it (encoded with XviD/Divx and put into AVI/MKV container - ONLY playable with specific standalones)
As for the software to burning them. Use Nero for any kind of CD or ImgBurn for Data CDs.
how long wud it take...
I am not sure what you mean here. Burning the data? Creating the rip? Nevertheless both depend on your computer's / cd-record's speed and which codec (audio/video) you use for encoding.
I am sure there are a lot of questions still open. Please ask them as accurately as possible so we can help you.