2 HDD on the PS2?
 

Is there any way to connect two hard drives to the ps2? Or, has anyone succssefully attempted to find a better way to swap HDDs, from a third party to the official sony one, whitout having to remove network adapter everytime?

Yes

http://ps2-scene.org/forums/showthread.php?t=24102

and here

http://ps2-scene.org/forums/showthread.php?t=24633

This idea could be used to do what your talking about. You would just have to switch off the power to one or the other before booting. I myself have been toying with this same idea. It would be nice to have the third party hdd to use with HDloader then the official Sony on a switch that could be booted but to play FFXI.

he had to cut his netowrk adapter though.

He doesnt explain how to do it either, like you need 3 cables, but I only see 1.

I may be blind though.

Look at the second link I put. He managed to do it without cutting the NA