Tutorial: How to Mod your Boot Screen[1]Go into app manager, search for OpenSSH Client and Server, install
[2]The installation will prompt you to put in a password (choose something easy to remember)
[3]Install "rootsh"
[4]Go to your computer, download a free SSH client such as winscp
(
http://winscp.net/eng/download.php#download2)
[5]Go back to N900, open X Terminal, type "sudo gainroot"
[6]Now, type "ifconfig" a lot of data will be shown. Scroll through this data until you find "inet addr:" The number should start with "192.168"
(N900 MUST be connected to a WLAN network)
[7]Open winscp on your computer and log in like this:


The password should be the password you set up at the installation on N900 and the User name is root
[8]In winscp, look for /usr/share/hildon-welcome/media folder.(you may have to click the back button once)
[9]Copy your boot video from pc into that folder.
[10]Once copied, go to /etc/hildon-welcome.d/
[11]Copy default.conf to your desktop and open the file in note pad and edit the text to
[hildon-welcome]
filename=yourfilename.aviObviously, replace "yourfilename" to whatever your video is called.
[12]Save the file and copy back to /etc/hildon-welcome.d/
[13]Disconnect and reboot your N900.
Thats it, done.
Enjoy your new boot video.
Download the maemo.org boot screens
HEREWARNING.. I WILL NOT BE RESPONSIBLE IF U BRICK YOUR N900!