Is it possible to run multiple instance of skype?
Solution 1:
I found it myself but forgot the site where I learned this, sorry :(
Run skype application from command line with argument /secondary
E.g.
In my case I executed "C:\Program Files\Skype\Phone\Skype.exe" /secondary
Solution 2:
Yes, run the first one on your computer and run the second one using the portable apps version:
http://portableapps.com/apps/internet/skype_portable