I have recently purchased the Router Board 750 GL. I didt know amount the installation of the 2 internet. I want to use two internet with the dynamic IP address. I didt want load balancing. I just want to get double the speed of my internet by joining two separate isps. .

you will never be able to download on a single connection with the speed of the sum of the 2 internet connections.
but you will be able to download torrents (they create multiple connections), or http files using download accelerators by load balancing the 2 internet connections.

I have just purchased the Routerboard 750GL. I want to add two dynamic isp ip and merge the speed of two isp connection for the getting maximum speed. I am a new user of Mikrotek. Please someone help me. For exp one isp 2mb + 2 mb isp = 4 mb. and one thing more if my one isp is failed then all the load would be shifted on other isp automatically. Please pleas help me.

Best way you can do is load balancing

http://www.tiktube.com/video/GEfq3hCljL ... uIlGopKGp=

and pdf from that video is here http://mum.mikrotik.com/presentations/US12/steve.pdf

Best way you can do is load balancing

http://www.tiktube.com/video/GEfq3hCljL ... uIlGopKGp=

and pdf from that video is here http://mum.mikrotik.com/presentations/US12/steve.pdf

Why load merging is not possible.