The window bounds are a list of coordinates {left, top, right, bottom}. You probably intended "400" to be the width, but it's the position of the right edge of the window and 400 is to the left of 1105, so you get a minimum width window. Change 400 to 1105 plus the desired width, e.g., 1505.
But before you pursue this further, Terminal has a better solution for this: Window Groups. If you set up a group of windows and save them as a Window Group, each time you open that group it will create windows with the same layout and appearance.
Window > Save Windows as Group…
You can even tell Terminal to open a selected window group at startup:
Terminal > Preferences > Startup > On startup, open: > Window group:
(As a shortcut, when creating a window group there's a checkbox for making it the startup group.)
To automatically run particular commands in those windows, you can create custom settings profiles and specify the command with
Terminal > Preferences > Settings > [profile] > Shell > Startup > Run command:
then create each window with the appropriate profile.
Going further, in Mac OS X Lion 10.7 you can have window groups automatically restore commands without creating custom profiles, by creating the terminals using
Shell > New Command
instead of running the command inside the terminal shell. When creating the window group, you can check "Restore all commands". (By default, it will restore a small set of "safe" commands, but you must explicitly tell it if you want it to re-run all commands when opening the group.)
Moreover, Lion Terminal supports Resume and will automatically restore all your windows each time you open Terminal. It will even restore "safe" commands for terminals created with New Command.
See the question Terminal doesn't show badge - how to enable?. In the accepted answer it says:
There is also an "unread text" indicator displayed in tabs, in the
form of ellipsis ("…"):
This is displayed when anything is written to a background terminal, and, like the bell indicator, cleared when you activate that
terminal window/tab. An "unread text" ellipsis is also displayed on
minimized terminal windows in the Dock.
Best Answer
Yes, create a .terminal or .command file with the settings you like. The contents can then be a normal shell script that sets up the terminal the way you like it. Classic .sh files work as well, but the icon is not as nice. Place you file in a directory of your choice and add it to the dock.
Once you have that part working, you can probably paste a custom icon of your choice over the file using Finder and these posts.