Sonic the Hedgehog Games Model Ripping

[TeridaxXD001]

I've been ripping the save icons from Sonic-related PS2 games lately, and I've hit a brick wall with Sonic Riders. I'm using the PS2 icon plugin for MilkShape 3D, but while it's worked for every other game I've tried so far, importing either the save or ghost data icons for Sonic Riders causes MS3D to crash, no matter whether I generate the save and ghost data files myself, or I extract the icons from save files that have been shared online. They're apparently stored in the file SLUS_213.31 and I have no idea how to extract them directly, which would probably be the cleanest way possible. I also tried a tool called ps2iconsys, which works on other icons, but if I try these, the command prompt simply ignores me and starts over. What in God's name is this game's problem?!