I take it that you mean "v.92", really revision 2.09 build 92?
Anyway, the "connectivity kit" software should've been included on the CD-ROM that came with the calculator, but there were some reports of problems with that one. Download the latest starting from HP's site. Choose your operating system from that page, although I believe that the software is the same for all supported MS Windows systems. For that matter, it will also take you to the newest official 49g+/50g ROM release.
If you also want the periodic table library, then that, along with the equation library files, can be downloaded from http://www.hydrix.com/Download/Hp/4950Libraries/.
A USB cable should've come with the calculator too. In case you don't have it, it's a standard male A to male 5-pin mini-B cable.
Note that you can update the ROM using an MMC or SD flash memory card instead, assuming that you have one and a reader to use it as a removable media mass storage drive with your PC. Personally, I find this easier than using the USB cable and Conn4x.
Regards,
James
Edited: 5 May 2007, 9:02 p.m.