[02:53] <erichammond> elmoro: When you use a different kernel (aki) than the default, you also need to specify the corresponding ramdisk (ari) for that kernel.
[02:53] <erichammond> In the case of kernel aki-550d2521, the corresponding ramdisk is ari-f4193180
[02:54] <erichammond> So, the full start command you want (tested to work) is:
[02:54] <erichammond> ec2-run-instances --region eu-west-1 --instance-type m1.large -k KEYPAIR --kernel aki-550d2521 --ramdisk ari-f4193180 ami-5486ae20