You don't need to have a disk in drive anymore.
You can select any elf from the hacked OSDSYS like HDL/HDA, uLE, SMS, USBADVANCE......
It works like a charm
The only negative point is that it won't load a elf file from HDD directly but for that we have uLE
PS2 SCPH-70004 V12 PAL + HDCOMBO + 160 GB Samsung HDD + OPL 0.9.1
PS2 SCPH-70004a V13 PAL Satin Silver
2 x Official Sony 8mb card +FMCB 1.8c + uLE 4.42b
Datel Max Memory 32mb card +FMCB 1.8b + uLE 4.42
Memor32 + Memento FW 1.2e