Well it's not really that complicated. You can get the PS2 emulator and plugins from http://www.ngemu.com/ps2 . After configuring the emulator (which should not be hard at all, only takes time to test different plugins), you can try booting your images. That's by setting your cdvd plugin to "Linuzappz Iso Cdvd driver" to boot your images. The problem comes here though. In order to be able to use the emu, you need the PS2 bios. Giving the bios files on the net is illegal though. This is what the PCSX2 staff has to say about it:
I'm not really good at explaining, so for more details you can visit their official forum: http://forums.ngemu.com/pcsx2-official-forum/
CKEmu @ PCSX2's offical forum said:It is Illegal to ask for a BIOS, as the BIOS is copyright of SONY. If you wish to use a REAL BIOS with PCSX2, you can dump it from your own PS2 (there are guides on the internet for that). Or find it by yourself.
I'm not really good at explaining, so for more details you can visit their official forum: http://forums.ngemu.com/pcsx2-official-forum/