No mod chip needed with Action Replay and SDLoad/GCOS.
Gamecube is temperamental in reading DVD-Rs unless you kick up the laser a little with a little lower resistance reading. Replacement top is all that is needed for the more inexpensive DVD-Rs compared to mini DVD-Rs. Expect risk of shorter life of the laser though.
The Phantasy Star Exploit is only the first white label game. not version 2 where it was removed.
I find the SD card a more compact and easier method. SD cards over 2gb which are SDHC also are a read problem without SDBoot version 4. Newest GC Action Replay has undocumented SD Media Launcher. It will read 2gb cards, load SDBoot 4. that in turn can read the SDHC cards. I just stick with the 2gb ones to avoid the SDHC hassles.
I tailored each SD Card specific to one EMU, kinda cool having SNES games on one tiny 2gb SD card. The run files are .DOL files. Lastly some of the more obscure Homebrews will only load from the older Action Replay custom code entry and SDBoot.
Bigger then 2gb are
SDHC cards:


