cperk4, I think you need to post a little background info for the smart guys to be able to help.
Sounds as if your install has worked up to a point.
Did you install 8.10 or 10.04?
Did you follow the instructions here
Did you install from a the release (downloaded image and burned to dvd) or internet install as described on the above page? If the release what was the image name?
What is your hardware setup - do you have just one machine or have you tried creating media directors (plugging additional machines into the internal network) yet?
This info may help others to get a picture of where you are and more directed questions to ask.
Regarding those 3 items
2.w32 codec pack
The first 2 are required to read encrypted DVDs but you only need to install them if you try to play a file/dvd or copy a dvd and get a message on the screen saying "unable to read" or similar. The message usually includes something about "libdvdcss2".
The third item should no longer be necessary at all in 10.04 AFAIK. Also, it is only relevant when you start adding media directors but I wouldn't worry about it at this stage.
Your sound issue - some of the smart guys should be able to help if you start by giving some detail about your hardware setup - what your video card and sound card is and the other detail I mentioned above.