This Presentation is for how to increase timeout to 10 seconds and default boot to windows in centos http://affordable-servers.com

1. How to increase timeout to 10 seconds of splashscreen
visibility and default boot to windows make changes
under grub.conf in centos

2. First take backup of grub.conf file under an directory

3. use vi editor to edit grub.conf file press i to edit use command vi
/boot/grub/grub.conf

4. and change default value to 1 and timeout value to 10 seconds
default value to 1 for windows
default value to 0 for centos

5. when it done press esc and type :wq to save

6. Reboot your system the windows boot by default and splashscreen timeout for
10 seconds