How do I run the updaters on my BIAB external HD? For example, I want to update the BIAB program on my installer hard drive (the external one) to build 20. ALSO, I want to install all those extra hold files and all that.

how? When I run the updaters, and I try to specify a new location, it says BIAB is not properly installed on that drive. I don't get it.

HELP!
THANKS!