Bun. I have a Panasonic and a Pioneer DVD recorders and usually save TV to hard drive. If the TV show was burnt to a disc and finalised, the only way I know is to copy to the original Hard drive and edit it there - cut out adverts etc. Then burn another disc. Maybe you can save it to your PC hard drive, then it depends what format it is recorded in. If video then eedcam suggestion pobably OK. I use Roxio Creator 2009, but it is not free.
Bun both the programmes will work direct from the dvd you just need to put the dvd in the pc and they will work from ityou can of course rip it to the hard drive first but you dont have to.Video redo is by far the beter and easier to use