Years ago there was no software to use Aladdin eToken PRO hardware with linux, so I started an open source project to write a driver for this hardware for linux. This project is dead. While old copies are still available via sourceforge file archive, the software has many known bugs and should not be used.
Instead you can use the (closed source) software provided by Aladdin itself.
Or you can migrate to OpenCT a new open source software for linux/*ix to use usb crypto tokens such as the Aladdin eToken PRO as well as many alternatives and smart card readers.
Regards, Andreas Jellinghaus, email@example.com
OpenCT is available at http://www.opensc-project.org/openct/.
Project website on sourceforge.net