hi, i have installed and there is no yellow in driver cd in management. so, the problem lies with indirect entries, obselete entries in the registry may be the cause. But i took care to delete all the connected entries of the original version from the registry , ie entries related to the opt 7561 dvd rw. but still the problem persists. apart from the generic drivers, the system takes the pnp device drivers from the cd dvd drive and if the Os is ide then it has the driver entries, in a separate folder called enum, ide, ie, hklm,system,class, and guide value in,enum folder, which has some established entries, other than the one at class folder guid entries.
your cdrom.inf tallies with my system , as otherwise, i may have drivers shown as error, yellow exclamation mark in the device manager.
sony site has some drivers for some of the version and optiarc , is a product of sony nec, they do not bother to supply the drivers. i searched sony site, but could not get any drivers. still working on this problem and hope to find the solution