Install Zyxel USG20

I'm an old USG20 on the shelf someone knows if is possible to reuse as an updated openwrt device.

the USG20 is powered by a Cavium CN5010 CPU running at 400MHz paired with 256 MB of DDR2 RAM, 128 MB of Flash, and a Realtek RTL8367R Ethernet chip.

if can be useful for someone here the Product Brief of the processor:

Currently there are no devices using the 5010 in the supported list.

Yap, yap I saw it.... I tried to see if there's a similar device on the list but nothing... np!

It will take some dust until some good guy come I think...

In any case thx so much for your time XD