(I also posted this in general audio, but thought it would be more fitting here...)

I have a Panasonic DVD recorder with a built-in 40Gb hard drive. I've opened it up and it looks like a regular 40Gb IDE hard drive. I was thinking that I could upgrade this myself using some hard drive duplicating software. Will that work? Has anyone tried this? Or do you recommend going with a company that specializes in doing this?

Since this may require a firmware upgrade I am thinking that I better let someone else do this. If so, are there any companies that you could recommend?