Yes or No

[mnvip]

I have the new system I bought today..
With the Grand T 3 inside.

I have been informed it;s a V4
Correct me if I;m wrong.

But what I want to know is what I need to play Backups.

I read I need a gameshark 1.8
But I want to knwo do I need a mod chip

I read places saying u don;t need one ,
and other places like here saying yes.

Please tell me what I need !!

Also does this swap method work
http://www.megagames.com/ps2/ps2swap/lesson1.shtml

Thanks in advance