Could anyone please tell me if its possible to connect a homeplug USB device to the WL500g (deluxe)?

I want to acces my internet connection through two homeplug USB devices.

Simple setup expl:
INET-> modem -> router -> homeplug -> (Electrical wire system ->) Homeplug -> PC

Extra info:
The devices work fine when connection 2 pc 's.
I was not (yet) able to set it up on my Linux KDE box, but on WinXP it worked.

So to clarify my question:
Can I use the USB port on the WL500 to share its WAN (internet) port?
(HOW? )