I think he means leave the cover off. However, the chances of being able to boot a disc with no cover on the PS2 are pretty slim, as the disc would probably be slipping about all over the place in the tray.
If I remember correctly, the v7 is still the larger old PS2 version, right?
You need to find some way of swapping the disc that triggers the exploit for the PS2 backup, without the PS2 knowing you've done so. ie, pressing the eject button.
So, you have 2 options; Change the current cover for a Flip-top one, or use a slide-tool to open the disc tray (which is more dangerous, as you could knacker the disc tray).
You won't be able to do it with just having the exploit on your Mem card.
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