On the step where it says "Please choose the destination volume you want to install on" there was nothing listed.

So I took out the disc (install had not begun yet) and tried to start puter as usual.... what I got was a flashing icon of the earth (network icon). I ran TechToolsDeluxe and everything passed except "Volumes"... the diagnostic said original "14gb" info and that it would replace it with "0gb" - I didn't go forward with the repair cuz I didn't want to lose all my data.
Does anyone have any suggestions/help/advice? Please...