You don't need a desktop or window system to run BOINC, also you shouldn't need to install additional libraries. Just log in and type:
[pre]
wget http://boinc.berkeley.edu/dl/boinc_4.43_i686-pc-linux-gnu.sh
sh boinc_4.43_i686-pc-linux-gnu.sh
./BOINC/boinc -attach_project http://einstein.phys.uw.edu KEY
[/pre]
Replace "KEY" with the account key you got sent by email.
You terminate BOINC by pressing Ctrl-C.
After that you can simply run it with
[pre]
~/BOINC/run_client
[/pre]
to follow the messages in the terminal, or
[pre]
~/BOINC/boinc -redirectio &
[/pre]
to have them written to a file in the BOINC directory.
BM
