I use this alternative to unghosting:

Create a web part page  with just a single zone and put it into a scrap document library
Place any web parts on that page and crack that page open in FP to do whatever you want with it (say convert it into a DVWP)
Export the page from the browser when you’re done all your modifications
Import the DWP file  onto a normal site

Optionally you can delete the web part page you unghosted or the entire document library. I use it as a sandbox so I’m not munging with my production sites in real-time with anything that end users would see.