Mutiple Objects , single file append

Hi,

I am getting UUIDs using the following Command:

get-wmiobject Win32_ComputerSystemProduct  | Select-Object -ExpandProperty UUID (http://www.waynehoggett.com/2009/08/get-local-computer-uuidguid-using.html)

how I can store the output on a network share that will append the itself if new record entered (UUID of a second machine)?

Also, can we get serial number or MAC as well, to differentiate which UUID belongs to which machine?

UUID         Serial           MAC
1234          Sssssss        ABCD
9876          Sxyz            A1B2C3

N.A.Malik