Usually the easiest way to get linux to do what you want is to talk to it through the terminal. I'm just saying this to encourage you to learn a bit of commandline stuff
For browsing an audio cd you can't mount it because it is not a regular filesystem (unlike a data disk). What you need is an audio player. I don't recall what programs DSL has, but if it has a cd player (like kscd, xmms, mplayer, xine) try using it to look at your audio cd. I suspect you could find one in the programs menu under "Multimedia" if DSL comes with one. If you don't have an audio cd playing program, you'll have to install one. I'm not sure how DSL is organized, so if this is the case hopefully someone else can tell you how to go about doing that.
As for accessing a usb key, you can try mounting it from command line. This must be done with root user privilages and the syntax for mounting something is:
Code:
# mount /dev/DEVICE /mnt/DIRECTORY
You will need to figure out what DEVICE your usb is. Usually it will be called: /dev/sda, /dev/sdb, /dev/sdc ...
To figure out which one it is, just list the contents of the /dev directory like so:
It will most likely be the one with the lowest alphabetical letter after the "sd". (You can just use trial and error, if you aren't sure.)
Once you think you know which device your usb key is, you'll need to create a directory to mount it to in the /mnt directory (which is the conventional location).
Now you can simply mount it:
Code:
# mount /dev/sda /mnt/usb
The contents of your usb key should now be in the "/mnt/usb" directory.
If you have any more questions, don't hesitate to ask.