error updating ps3 linux

[bigd]

hi
i am trying to update ydl but i get this error:

Downloading Packages:
warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID aeb6b9c4


Public key for yellowdog-logos-4.0-1.ydl.4.noarch.rpm is not installed

then i try to d/l that rpms and install and then i gtet this:

('file /usr/share/firstboot/pixmaps/splash.png from install of yellowdog-logos-4.0-1.ydl.4 conflicts with file from package firstboot-1.4.6-1.ydl.1', (7, '/usr/share/firstboot/pixmaps/splash.png', 0L))

any ideas? a few months ago i idid follow the protocol for installing vlc and mplayer so im not sure if playing with the databases then changed anything.

cheers thanks