Mikrotik bonding

If I have a mikrotik router with 4 adsl links and a mikrotik router in a datacenter, whats the best way to use mikrotik bonding to create a single pipe?

create multiple pptp/l2tp connections then use eoip?? I wasnt sure how to create multiple eoip sessions leaving on 4 different adsl interfaces at the same time. I couldnt assign an eoip tunnel out a specific gateway.

for bonding you have to be able to control both ends of the link, in this case both ends of your ADSL links. Are you sure you apply for that?

if not, then you should go load balancing route:
http://wiki.mikrotik.com/wiki/Bandwidth_Managment_and_Queues