Gracias Jorge, por tu valioso tiempo:
El codigo que hice me funciona a la perfeccion para cargar el XML, pero me piden que lo haga de esta forma, con name value/pairs, y asi no lo se hacer... Me pasaron esta info directamente del proveedor, mira:
The following screen shot shows how to send the xml down using the MCClient. In order to access the dialog displayed, complete the following steps.
Launch the MCClient and log into the server.
Select the EPC where the EPV is located.
Select the “View Details and Manage Updates” button.
The Device Details dialog will be displayed.
Select the EPV you wish to send the XML.
After you have selected the EPV, you will have access to buttons in the right pane under the Viewer Commands tab.
Select the “Set Name/Value Pairs” button.
Input the Variable Name “ContentURL” into the Name: field.
With the Type pulldown select “Set Viewer File”.
The Browse button will be enabled.
Select the “Browse” button and select the xml file.
Select the “Add” Button.
Select the “OK” button, the dialog will disappear.
Select the “Submit Updates” button.
The command will be sent to the viewer and the xml file will be transferred to the device if it does not exist on the device. The file will be converted to the MD5 version of the file and the variable “ContentURL” will reflect the file located on the device.
The above flash code will load the MD5 xml file using the variable set by the teacher. 
De donde se sacan esta ventana?