On your switch, create ten vlans, say 1011 - 1020.
Create an access port for each vlan where you plug in your DSL links accordingly.
Create a trunk port with all those vlans on it and connect it to your router.
On your router, create those ten vlans attached to the physical trunk port interface.
If necessary, create PPPoE-Clients on those vlans.
Assign the appropriate IP addresses or DHCP-clients to those either PPPoE-Clients or vlans.
Then go ahead with the load balancing manual referenced above and set interfaces accordingly.
MTCNA, MTCUME, MTCWE
There are 10 types of people: Those who understand binary and those who don't.
There are two types of people: Those who can extrapolate from incomplete data