installed it thru synaptic, then ran commands:

Preparing to replace linux-image-3.2.0-0.bpo.1-486 3.2.4-1~bpo60+1 (using .../linux-image-3.2.0-0.bpo.1-486_3.2.4-1~bpo60+1_i386.deb) ...
Unpacking replacement linux-image-3.2.0-0.bpo.1-486 ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/initramfs-tools 3.2.0-0.bpo.1-486 /boot/vmlinuz-3.2.0-0.bpo.1-486
run-parts: executing /etc/kernel/postrm.d/zz-update-grub 3.2.0-0.bpo.1-486 /boot/vmlinuz-3.2.0-0.bpo.1-486
Preparing to replace crunchbang-bin-scripts 0.19 (using .../crunchbang-bin-scripts_0.25_all.deb) ...
Unpacking replacement crunchbang-bin-scripts ...
Setting up linux-image-3.2.0-0.bpo.1-486 (3.2.4-1~bpo60+1) ...
Running depmod.
vmlinuz(/boot/vmlinuz-3.2.0-0.bpo.1-486
) points to /boot/vmlinuz-3.2.0-0.bpo.1-486
 (/boot/vmlinuz-3.2.0-0.bpo.1-486) -- doing nothing at /var/lib/dpkg/info/linux-image-3.2.0-0.bpo.1-486.postinst line 268.
The link /initrd.img is a dangling linkto /boot/initrd.img-3.2.0-0.bpo.1-486
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.2.0-0.bpo.1-486 /boot/vmlinuz-3.2.0-0.bpo.1-486
/etc/kernel/postinst.d/initramfs-tools: 33: update-initramfs: not found
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 127
Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-3.2.0-0.bpo.1-486.postinst line 696.
dpkg: error processing linux-image-3.2.0-0.bpo.1-486 (--configure):
 subprocess installed post-installation script returned error exit status 9