When CLY came back, she needed the wireless network for work but it can't be done, so she almost asked someone to courier one from China since she has extra over there. Luckily she suggested try using the addition network cable to connect the router instead of using wireless.
It works, the wired network is usable.
I forgotten the fact that the router itself can connect up to 6 different computers through the network cable (aka LAN cable), luckily I had a spare 25m long LAN cable so it can be dragged a little further away for my sis to use. I laughed at myself because I didn't think of it at the first place, almost going to replace the router already.
A wired connection is always better than a wireless if the signal is weak and the connection is slow. Apparently the router's wireless function is no longer functioning well, so now it splits up the 512kbps connection into 2X 256kbps. Still can surf the net but obviously it's slower than having full connection.
Wireless is actually very useful, but for my case it's not good enough. I heard negative feedbacks from the Netgear products, as my friend working in Low Yat Plaza told me most of the time people would send Netgear's products for repairing or service.
Now I'll just stick with this config..... because my sis wouldn't stay up for a long period so later I'll revert back to full wired network connection.
Settin' up the network seems easy, but sometimes there're uncertain & unknown problems buggin' around, like this one I frequently encountered: "Clash in IP address with another networking computer etc."