how to install debian on Turion x2 64bit

["Jabka Atu" <mashrom.head@gmail.com>]

Hello and good day;
recantly i have bought acer 5102wlmi 
sys info:
Amd Turion 64 x2.
1Gb.
100gb pata.

I'd Like to run Debian Unstable for 64 bit.
the question is how to instal it:
1.to install normal 32 bit an search to find 64 kernel or to apt-get upgrade dist-upgrde to 64 bit miror

2.some where instaltion dvd for 64 bit.
then upgrade to unstable.

the question come becouse i cant find insatlation dvd for 64 bit,