I've read various threads and "how to's" here, but I'm having more questions. (maybe just a clarification)

 I have a DSR704 that I updated a while back with an additional 160 Mb drive.

I think the older, original primary drive is going bad (noisey, pixelation, random rebooting) So, I thought I'd remove the original drive and re-configure the 160 MB to work alone.

 I just installed a p[re-configured DVRUpgrade PTVNet enabled 160 MB drive in another DSR704, so I want PTVNet on this one as well.

Do I need to get both InstantCake and PTVNet CD ISOs?

One of the threads mentioned that the PTVNet only works on drive that were upgraded using msftools (used by InstantCake).

This leads me to believe I need to get both InstantCake and PTVNet ISOs.

Are these the only ISOs I need? 

Am I on the right track here?