Hello Utu,
thanks for your words but my experience comes from the fact that I like to understand how to improve system performance by using hardware and software available without having to invest any more money...
I like to fully understand how things work...

Anyway in your case if you have multiple cores (2 cpus), then using a single zram can be a bottleneck, so you need zram0 e zram1 (it's present in your /dev/ ??)
Code:
modprobe zram  num_devices=2   #On July 20th 2011, the zram driver in the linux 3.1 staging area was modified to use zram_num_devices as modprobe parameter
echo $((512*1024*1204)) > /sys/block/zram0/disksize   #Allocate 512MB to zram0
echo $((512*1024*1204)) > /sys/block/zram1/disksize   #Allocate 512MB to zram1
mkswap /dev/zram0
mkswap /dev/zram1
swapon -p 100 /dev/zram0
swapon -p 100 /dev/zram1
But beware, I have not tested anything right now, I just created a swap in ram. Now we need to see if it actually works. It 's likely to miss the module zram.ko as you have highlighted. I'm waiting 7.0.1 too.

Regards.