On NBF there is a guide to disassemble Emachines M68xx/ Gateway 74xx series. Using that guide you gain access to the second RAM slot. By default the 7405 contains 2x 256 MB RAM, that guy changed both sticks to 1 gig PC3200. This upgrade will void the warranty. From what I understand if you do it correctly then you should have no problems warranty wise.
Just to keep this ontopic, yes the firmware is an unaltered version, The Dangerous Brothers sent me a program to extract the RAW image of the firmware from my drive and put it in a windows flasher for me. I have tried and was able to revert back to the 0g03. To my knowledge there is no way that Gateway/Arima (the acutally manufacturer) can tell that the firmware was flashed. Plus the odds of them checking are slim to none unless the problem is the DVD Drive. Just make sure that if you do need to send it in, do not tell them, and revert back to the 0g03 firmware. In fact I will be sending in my 7405gx soon because of the cracked hinges.
As you read the other forum more, you will see pmcartney. He doesn't like the Sony firmware, don't know why, but he does not like it. He thinks that the HP one is better. His points are valid, the best firmware is the one that comes with the drive.
But the one with the most features is the Sony one. Apparently HP has firmware that can also burn DL but not quite sure of DVD RAM.
I will email you the original firmware shortly.
Now for the fun part, the disclaimer:
I will not be held responsible for any damage that may or may not be inccured during the flashing procedure of your drive. This is the firmware that was created by The Dangerous Brothers, using the firmware taken from my drive. It is firmware revision 0g03 that was taken from a Gateway 7405gx. Flashing your drive is dangerous, and will void your warranty if your OEM finds out.
With that being said, I have not found/had any problems with the firmware, nor the Sony OEM firmware for the GMA. I have also not been told of any problems. However just because it has worked for me and others does not mean it will work for you.
By using the firmware you understand that you have the sole responsibility in all and any damage done to you computer.
To avoid any problems, a fresh install of Windows is reccomended. If a fresh install is not available, make sure it is virus free, and there are no runaway programs that may cause your computer to crash. If the flashing process is interupted damage may be inccured to the drive. Also make sure that there is no media (CD, DVD, etc) in the drive, as this will mess with your laser calibration and, agian, may damage your drive.