[HOWTO] Installing Adobe Reader 9 to Ubuntu 9.10 Karmic Koala Alpha 4

I tried to install Adobe Reader (acroread) in Ubuntu Karmic Koala Alpha 4 amd64 (64bit Version) that I use. I added medibuntu repository but package acroread was not available. Then, I downloaded deb from http://get.adobe.com/reader/otherversions/ but 64-bit version (amd64) was not available. So I downloaded Linux x86 (.deb) version and then installed it with the following command via terminal:
sudo dpkg -i --force-architecture AdbeRdr9.1.2-1_i386linux_enu.deb