Dear All I have RB750GL I want to know how we can load balancing more then 4 Wan can i use Vlan if yes so kindly tell me how can i connect adsl modem via vlan or any other option plz plz plz.

If you have an upstream device that can tag the traffic with a VLAN then yes you can. If not then you will need to stick another switch in place between the RB750GL and the DSL modems to tag the traffic.

Is there any way to put 5 adsl modem and 0ne local in RB750GL ????

I suggest you buy a 2011