Umm.. I didn't find any product's manual too I'm afraid.
I've looked through the entire site. My router's model is referred to as "DSL-2760U":
I just read that this specific model was designed especially for Israel's infrastructure company so I'm guessing that's why we can't find this specific model on the US site, but then again.. there's no official manual on the Israeli site either, just a quick how-to installation.
I can add that the file server is pretty much based on Samba and to access my file server, I basically type in the address bar:
(Router DG = 10.0.0.138)
(foldername = whichever desired name I give to the drive inside the route's interface)
Anyway, without the manual I'm guessing we're kind of lost and I really appreciate you guys trying to help me, but I'll try and overview the Israeli site again and might even try to contact them to see if it is possible.
As always, thanks a lot!!