What problems are you having? I just succeeded in installing Debian 6.0.2.1 amd64 netinstall and then loaded the Parallels Tools from Build 6.0.12094.
When I first ran Virtual Machines | Install Parallels Tools it didn't properly mount the cdrom, and I was getting permission errors. I ran these commands (as superuser or with sudo):
umount /media/cdrom
mount -o exec /media/cdrom
Then I could run ./install and installation worked.
