Thanks for your thoughts. I have installed a BOINC-client (as proposed by Tokolosh) in my home directory (as
proposed by Tony). The trick is to use version 6.6.41, which runs on COS 5.2 without issue. It required the following steps:
1. Setup a WCG account:
Join the World Community Grid www.worldcommunitygrid.org/index.jsp,
log in and select your projects.
2. Install BOINC client on COS:
which creates a new directory, /home/mydir/BOINC, where the executables reside.
3. Start BOINC:
/home/mydir/BOINC/run_client --allow_remote_gui_rpc --daemon
/home/mydir/BOINC/boinccmd --project_attach www.worldcommunitygrid.org account_code
Your account_code is on secure.worldcommunitygrid.org/ms/viewMyProfile.do
Putting the two commands into /etc/rc.d/rc.local ensures that BOINC is started at boot.
4. Managing the BOINC client:
There are several ways: using an internet account manager such as BAM! or GridRepublic, downloading and installing the BOINC software on a windows machine, using the graphical manager to connect to BOINC on COS, or installing a windows/apple/linux based LAN manager.
I choose the latter apprach, downloading BoincView. The nice thing is, that it handles multible clients - so now I have the COS client as well as 2 Windows clients managed centrally. The most difficult part was getting LAN networking setup on the windows boxes.
The software can be downloaded here
The download is a zip file. I saved it on my desktop and then extracted it to c:\Program Files\BoincView. I also created a shortcut to the startup menu so BoincView starts automatically upon boot.
Connecting to a boinc-client requres a password, which is found in the file /home/mydir/BOINC/gui_rpc_auth.cfg on COS and in the BOINC directory on windows.