How do I get Lotus Symphony 3.0 working?
First, try the package someone else has already done for you.
If not, then you'll have to pretend you're on 32bit.
Start by running the following in the terminal, providing your password when prompted.
sudo apt-get install ia32-libs
Downloading Lotus Symphony 3.0.1 (choose language, login, accept terms).
Then run this, replacing Downloads/your-package.deb with the actual package location and name.
sudo dpkg --force-architecture -i Downloads/your-package.deb
You may also want to Download Lotus Symphony 3.0.1 (Fix Pack 3), and install that in the same way.