wanna get more download speed in Internet with YDL 4.0 FR

[amber]

I am using YDL 4.0 FR on G5 2GHz Dual.
I want to get more download speed in Internet.

How do we set up on a terminal?

for example, on Mac OS X
$ sudo syscrl -w net.inet.tcp.recvspace=51200

I wanna get more speed.