I need to save my incomplete project on a dvd to continue editing later on, I need to uninstall and install cs4 due to a debug event error message. is there is practical way of doing this?
Save it on disk. Why DVD?
If you have an incomplete Project, that you will want to edit in the future, do not Burn a DVD-Video. The results WILL suffer.
Instead, pick up an external HDD, or use one of your internals, and use Project Manager to gather up all Assets and Archive that. You do not need the Render files, or your CFA & PEK files (they will be redone, when you open the project later - be patient).
That would be the best course of action, IMO.