There is an optional file called config.txt in the /boot directory (the /boot directory is the part of the sd card visible from a Windows computer).
On the Pi create/edit the file by using the command
sudo nano /boot/config.txt
or any other editor you are happy with.
On a Windows machine you could just create/edit the file in the top level directory of the sd card (the top level directory should already contain files such as start.elf, loader.bin).
The Raspberry pi works fine, creating the SD from an image (Openelec)
Then i put teh SD card in a windows computer (tryed 2) It says, do you want to format the card?
(Windows dont reconice any partitions)
From WinSCP/SSH can i see the place (root) with files like loader.bin an so on, byt is a read only zone, trying to set 777 but not possible...
3. I decided to access the SD card through RPi, and I’m using the program “WinSCP” for that. The /flash/ folder is read only by default so you need to mount it with write permission before you can upload your config.txt file. (I’m using PuTTY for that) Run these commands to do it:
a. Command: “mount -o remount,rw /flash”
b. [Then upload your config.txt file through WinSCP]
c. Command: “mount -o remount,ro /flash”
d. Command: “reboot”