iACS session startup questions

I've been banging my head on this for a while, and I just can't seem to get all the pieces in place.

My goal is simple: click on an icon in the tray and have all my sessions come  up, and then disseminate this technique to my coworkers.  I want several sessions to different IBM i partitions.  In my personal case, I want two each to two partitions, while a coworker wants three each to those same two partitions.  We both want each one to be in its own, untabbed window.

After lots of Googling and fiddling with the .hod and .bchx files, I managed to get the sessions all to start in individual windows, but I'm having troubles getting some initial session attributes to stick.  It seems like some of the attributes in the setup files are valid and some are ignored.  In particular, the starting position seems unreliable.  Right now no matter what I do, some of my sessions appear with a significant portion of the window off the bottom of the screen.

Also, on my machine I'm prompted for my credentials once for each partition.  The additional sessions for the partitions then connect, so I effectively only have to enter my user profile and password twice.  My coworker, on the other hand, has to re-enter credentials for each window, which in this case means entering them six times.

My goals:

1. Specify the location (and size, as needed) of each window and have it used at startup.
2. Move the windows as needed and have those new locations stick.
3. Set it so I only enter my password the first time.

Does anyone have insights on this?