I too have been trying to do something similar. And as this is new open thread I will post in this.
I have 2 MTNL
ADSL connections, one is NU and other isnt., 2
routers both UT 300R2U.
Now my goal is to try and use both connections at the same time. I mean basically I want both inbound and outbound Load balancing to maximize the total bandwidth in different web applications(browsing,P2P downloads etc) and not to use one when other fails as backup.
My options are two
1) Hardware base solution : Using Dual Wan Routers (I dont know about price and availability in INDIA , any help in this case is much appreciated)
OR building up a LINUX based router from old pc (Have read a few guides about it, but not sure how easy/tough it is)
2)Software base solutions like using midpoint software or surfdoubler. ( i havent yet got these softwares but would like to know from some1 who has used these)
OR May be Using Virtual Machine software to connect to other connection.
I tried digging some info on this but didnt find a lot of info.
I request all the forum veterans and others to guide me through.