Jamba is not a multiplexer, it does not have the ability to pass any keystrokes between the master and slave clients. You would be able to follow, but you still need to be able to pass keypresses to be able to make use of the ingame Interact with Target option for picking up and turning in quests. The same with looting, you will again need assist and interact passed.

If you aren't ready to make a commitment to ISBoxer, there are many options out there. Check the Newbie's Guide Vol 1 - it gives a list of various boxing programs ranging from free to 1time fee to subscription. You also have the option of requesting a trial on the ISBoxer site. The Newbies Guides also include all the basics and move into more advanced information on how to multibox and contains a whole load of links to various setup guides no matter what you choose.