just to let u know, this drive is one of the biggest hoaxes in cdr history. every forum on the net is filled with problems users have had. in a nutshell, creative rebadged like 3 different drives under the 843xE title. go to your bios, serial number, or windows device manager to find out which EXACT model # u have.
if i am dumb, and you actually already know ure model and got the right firmware, i apologixe, but there is only one firmware upgrade i know of for the creative 843xEs, version 1.07 for the 8432E (plextor). even then its only for win9x. do NOT upgrade your firmware if you do not have this model.
also, dont hope that the firmware will change the sound level/heat of the drive. it prolly won't. just live with the version u have, ESPECIALLY if it works. NB this is the only drive i would actually recommend NOT updating.
hope this helps.