I have a Matrix Infinity and boot to LaunchELF using DEV1 (holding R1 on boot). The /BOOT/ directory shows up as a Corrupted Data object in Sony browser, so I decided to create a custom icon file for this folder. Here it is for you to use if you like. Use your favorite utility to copy the .icn and .sys file into mc0:/BOOT/.
Also, is it just me or does Firefox not work with the "Manage Attachments" button? Had to fire up IE to write this.