Installing Trinity 3.5.12 on Squeeze

Hello, all! I am trying to install Trinity 3.5.12 on Squeeze, with LXDE already installed, (sources.list below). Having edited my sources.list, I then: # apt-key adv --keyserver keyserver.quickbuild.pearsoncomputing.net --recv-keys 2B8638D0 # aptitude update # aptitude install desktop-base-trinity kde-trinity I got a long list of unsatisfied dependencies and a suggested resolution. I tried, as I usually do, to see what was unresolved and what I wanted to do about it, but this proved so difficult in LXDE's terminal that I finally decided to install whatever it would install, and take it from there. It installed nothing. (Or, as it put it 0.) I did exactly this a couple of weeks ago on another computer, and ended up with Trinity 3.5.12 up and running. Can anyone spot what I have done wrong this time? To make matters worse, I have to get this done by tomorrow. :-( Thanks. Lisi <quote> # # deb cdrom:[Debian GNU/Linux 6.0.0 _Squeeze_ - Official i386 NETINST Binary-1 20110205-14:34]/ squeeze main #deb cdrom:[Debian GNU/Linux 6.0.0 _Squeeze_ - Official i386 NETINST Binary-1 20110205-14:34]/ squeeze main deb http://mirror.ox.ac.uk/debian/ squeeze main deb-src http://mirror.ox.ac.uk/debian/ squeeze main deb http://security.debian.org/ squeeze/updates main deb-src http://security.debian.org/ squeeze/updates main deb http://mirror.ox.ac.uk/debian/ squeeze-updates main deb-src http://mirror.ox.ac.uk/debian/ squeeze-updates main deb http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity/debian squeeze main deb-src http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity/debian squeeze main deb http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-builddeps/debian squeeze main deb-src http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-builddeps/debian squeeze main </quote>