On the OS Administration Webpage you can upload files to the tftp directory. Copy your List.xml, *.png, TN-*.png to the directory Desktops/320x212x12 and restart tftp server.
! Sample List.xml
FTP:Desktops/320x212x12/TN-*.png"
URL="TFTP:Desktops/320x212x12/*.png" />