For any PS2 (slim or fat) with model number less than 9xxx, the simplest method is to obtain a memory card with Free MC Boot installed. The cost of such a memory card is around $10 (USD) on ebay. Once you have such a memory card, you can create new ones (I always have one as a backup that I have stored away safely). For owners of the fat PS2 consoles, you can also soft mod your PS2 to use your HDD (and even use Free HD Boot). Yes, I am aware that many users are kind enough to provide a free service for installing FMCB. I am of the opinion buying one from ebay is better than the time/cost it takes to send away a memory card and have it freely modified with FMCB. If you own a fat PS2, then you actually can create your own FMCB memory card without having to do any of the disk swapping nonsense. All you need are: the official network adapter and a PATA IDE HDD. Consult http://ps2drives.x-pec.com/?p=list for compatibility. You can alternately modify your network adapter to use SATA hard drives with: http://www.maxdiypower.com/index.php?main_page=product_info&products_id=103. If you stick with PATA drives, then chances are you will need some sort of USB adapter. I personally use: https://www.amazon.com/Sabrent-USB-...d=1499650298&sr=8-1&keywords=pata+usb+sabrent which has support for both SATA and PATA and runs on the faster USB3 ports (backward compatible with USB2). Lastly, you will need a USB drive formatted to FAT32. Once you have the necessary hardware, it is a fairly simple process. The idea is to write a boot image to the HDD so that we can run custom code. The boot image can be found in the first post of this thread: http://psx-scene.com/forums/f153/softmodding-fat-ps2-hard-disk-drive-[tutorial]-116178/ (the direct link is: http://psx-scene.com/forums/attachm...2-hard-disk-drive-[tutorial]-fat_soft_mod.zip) Connect the HDD to your computer. Mac and Linux users can copy the image file to their HDD using the dd command. Windows users can use Win32 Disk Imager (https://sourceforge.net/projects/win32diskimager/). There are plenty of alternatives, so feel free to use your favorite. Connect the HDD to the PS2 via the network adapter. (Make sure that the PS2 is unplugged whenever installing or removing the HDD or you could very well blow a fuse!) When you boot the PS2, it should eventually load up UlaunchELF, which is basically like very simple-looking (but powerful) Finder on a Mac, or Windows Explorer on Windows platforms. Use this to run the FreeMCBoot installer (http://psx-scene.com/forums/f153/fmcb-v1-9-series-release-thread-116247/) by copying the installer onto a USB drive and plugging the USB drive into the PS2. Use UlanchELF and traversing to the USB drive (called mass in the UlaunchELF browser) to find the installer. Always format your memory card first! You can optionally install FreeHDBoot (the HDD equivalent of FreeMCBoot) but it will likely be slightly slower in terms of bootup time when compared to FMCB.