installing debian on AMD opterons

[zhang zhengquan <zhang.zhengquan@gmail.com>]

Hello, debian community,
Tomorrow I will install lenny on a server with two dual core AMD opteron cpus.

I would like any debian users to confirm that

this is what I need to download, burn and install?
http://cdimage.debian.org/debian-cd/5.0.0/amd64/iso-cd/debian-500-amd64-CD-1.iso

and I vaguely remember it is troublesome to install 64bit linux and it
will have lots of compatibility issues? Is that still the case for
lenny?

Thanks for any pointers,
Zhengquan