I have Netgear dg834g router with kamikazi  (Bleeding edge, r12985). I heard that the builtin modem with not work with openwrt. Now I want to restore the orignal firmware into the router in order to use the modem functionality.

Can anyone please tell me how can i reflash the orignal firmware via adam2 without using the Netgear Recovery tool (which crashes on my computers)?

I liked openwrt alot but have to use the builtin modem.