iproute2 source routing

Hi,
I am trying to configure [loose] source routing,
to a server Russia. The ISPs at both ends route their
traffic through satellites by default.
I know a much quicker landline route to that location
in Russia.
I have some experience setting up source routing to
local nets and that's working just great with iproute2
tables. But when I have no idea how to accomplish this
for remote hosts / nets.
When I try to add a route to the table x
with nexthop via v.x.y.z etc. I always get a no route to
host error.

Does anyone know how do source routing to a remote host?
Please give some hints or tell me where I can find
additional information concerning this matter.
I found several pages concerning source routing,
but there are only examples for local nets or networks
that reside on the router's interfaces.
I want source routing for remote hosts.

Thanks in advance,
Sven