Hi ddewaele ;
In order to create and custom your own image, take a look at the Intel® Edison BSP User Guide. You may also want to check some packages in http://downloads.yoctoproject.org/releases/yocto/yocto-1.6/ipk/core2-32/
There is a lot of useful information in here too: https://wiki.archlinux.org/index.php/L2TP/IPsec_VPN_client_setup
Regards;
CMata;
