Pentium Dual Core Q6600 2.40Ghz
NVIDIA GeForce 8800 GT
PBDS DVD-RW DH-16W1S
, more then ample. Transfering "600 hunderd megabytes" should be nothing for your machine to acomplish.
I don't understand why you would have problems unless the firmware for your DVD writer needs updating. What flavour of Vista are you running?
I have read where installing the latest firmware has helped a lot of new Vista owners. A word of warning, some people are afraid to attempt this but I have done it several times in the past with no headaches.
Dell Support - Technical Support, Drivers & Downloads, Troubleshooting, Product Manuals and Order Status
Have you rebooted your computer since the last time you tried to burn your pictures this sometimes helps.
Maybe someone else who uses Dell can give us some insight.
Meanwhile Joe check through the "Drivers
" part of this forum on the first page and see if anybody has a post about your prticular writer.