How to backup your PS2 Linux Disc 1 to a CD-R (or HDL image..)
Dummy File Maker (included)
CDGenPS2 3.0 by Hermes (freeware, also included)
(working) Original PS2 Linux Disc 1 DVD
A blank CDR
DVDScan 3.7 (FIND IT YOURSELF!)
Step 1: Use ISOBuster to extract ALL the files from your Linux disc to a temporary folder. I will be using "PS2-LINX" as my temp. folder.
Step 2: Delete the (YES, delete) 1GB DUMMY.DAT file. The reason why PS2 Linux uses a DVD for 14mb's of files (yep, thats it) is because the second disk could not fit on a CD. The PS2 cannot switch between CD and DVD media in one session. This is also why YOU CANNOT install Linux with this disc, only boot it, and this guide is very useful because HDLoader users will be able to boot Linux from a 300mb CD image instead of a 1gb DVD image.
Step 3: LAZY PEOPLE: download the pre-made dummy.dat file. It's only 360kb!
Create a 300mb dummy file with Dummy File Maker. Place it in the temp. folder. NOTE: For compatibiliy reasons, rename the dummy.bin to DUMMY.DAT. To rename file extensions in Windows XP, you have to open a folder, then select Tools > Folder Options. Click the View tab, scroll to "Hide extensions for known file types" and uncheck this box. Press OK and you will be able to rename files as well as extensions. Useful for many, many reasons.
Step 4: Rebuild the image with the new dummy file. Use Sony's CD/DVD gen for best results, but for legal reasons, ALWAYS use CDGenPS2 3 or similar. Simply drag the files in, and when you're done, press IMG and save it to a ISO file. If you are lazy, here's the order the files should be in:
Step 5: Burn the image output from CDGen to a blank CDR, or install the image to HDLoader with WinHIIP or HDL Dumb.