hi please any one can help me

i had 2 adsl routers 1 vs 2 m and the second has the same speed
so i has mikrotik v 3.30
wanna merage them to has 4 m speed
and wanna know coz i has about 20 users thy use download much that had a bad effects on browsing and Surf the Internet so how can i save a good download with a speed browsing ? i mean if there away to separate (download by about 2 m and browsing and surf internet by 2 m)

not routers i p is 192.168.1.1 and 192.168.2.1
with lan out 10.10.10.1
thank you

If you want to combine the speed, your ISP must support that, and they must make that change on their side. THEN, you set up MLPPP http://wiki.mikrotik.com/wiki/Manual:MLPPP_over_single_and_multiple_links on your router.

You can also do load balancing and PCQ to make everything more fair for everyone.