I'd been trying for a couple of days to get spark going on my Alien 2. Being completely new to this I found it really confusing.
Anyway, in the end I managed and in case anyone else has the same problems I thought I'd put it down in as simple as possible terms I could use.
How to use Oscam with Spark on an Amiko Alien 2
Search for an app called CCcamconverter 1.1, or the latest version but bear in mind this is based on 1.1, unrar and double click the .exe to start.
At the top left click the corresponding button to your line. (in my case it was "N" lines).
At the top right click the "Open Cccam.cfg" button and navigate to your Cccam.cfg file you should have received from your server provider, select it and click "open".
If your Cline doesn't appear in the top half of the window then you have selected the wrong type of line, look again at the three buttons top left and select the one with a (1) next to it.
In the middle right you will see a button called "Convert to Oscam" (it has a red arrow on it) Click it
You should see some text appear in the bottom half of the window.
Just below the "Convert to Oscam" button are two more buttons,. Click "save oscam.server" and save it to a place you will easily remember. I use my desktop when working with single files.
Open Dream Control Centre.
Make sure you have green lines between P.C. Dreambox and Router.
This was my first time FTPing so I'm not going to go into detail. Needless to say you will have to configure DCC to your system and get the green lines between your various gadgets, one thing I will mention that caught me out for a while is the address of your Alien 2 can change sometimes after turning it off then on again.
When you have the green lines hit the "FTP" button near the bottom left corner.
In the left panel navigate to var/tuxbox/config/oscam.server and delete the oscam.server file by right clicking and useing the delete button in the menu that appears. (you could make a copy of it first if you wanted)
In the right hand panel navigate to the oscam.server file you got from the conversion earlier and highlight/select it.
In between the left and right panels you will see two arrows, click the one pointing left and you will see the converted oscam.server file appear in the var/tuxbox/config/ box.
Right click the file and select attributes, if it isn't 755, change it to 755, otherwise leave it.
Save and exit DCC.
On your Alien 2, enter menu via remote control, select plugins, select oscam4spark_tools.s and turn it off, then on again.
Exit menu and you should be good to go.
Please note- I'm not saying this is the best or the right way to do this. I'm just saying this is how I did it, and it worked for me.
