Well, I looked up my DVD-ROMs on the net. Laptop is identified by Device Manager as a "Toshiba DVD-ROM SD-C2202". Toshiba doesn't list ANY firmware that I could find. But, on the tech specs, it lists only, "DVD-ROM (DVD-5, DVD-9, DVD-10, DVD-18), DVD-R (read, single border)"
(I always thought burning any kind of RW media (CD or DVD +/-) as a R disc would make it readable in anything...if the Laptop's Toshiba drive can read -R, why can't it read a -RW burned as a -R disc?)
The Desktop's DVD-ROM is identified as a "Samsung DVD-ROM SD-616T"...although it looks nothing like the SD-616T on Samsung's website. I found a firmware file on the webpage, but I don't know if I already have that firmware package or not...how do I check? Also, the specs for that say it only supports DVD-R also, but I know it supports -R, +R, +RW.
Thanks for the help