You are correct; the correct way to write it is based on the number of the closer subject:


  Either you or your sister is going to have to do the chores.


As suggested in point 5 on this page, you might consider the order of the subjects to avoid awkward phrases if one is singular and the other is plural. Compare


  Neither my father nor my brothers are going to sell the house.


with


  Neither my brothers nor my father is going to sell the house.


Is "either you or [third-person]" followed by a singular verb or a plural verb?
I'm following the steps provided here to root my Samsung Captivate (Galaxy-S).  I install the USB drivers in the link provided.  Whenever I connect my phone, I get the error There was a problem installing this hardware... SAMSUNG Android Composite ADB Interface.  I do have USB Debug mode checked on my phone.

The googling I have done on this issue mention downloading the Android SDK, but I have heard no mention of needing this on the XDA developers forum or in any other conversation about rooting.  So, I wanted to ensure that downloading the Android SDK was necessary, or would even fix my problem before I bother installing it and its dependencies (Java JDK).  I'm running Windows XP.  

Note:  Although I'm running a 64-bit machine, I Installed the x86 Samsung Drivers since Windows XP is a 32-bit OS.  I hope that's right.

  
