Automatically Adjusting Right-Panel Column Widths

The column widths in the right hand panel of the Explorer might not be the correct sizes to display all the file information.
To automatically adjust all the columns at once to show all the information,

Click somewhere on the right-hand panel
Simply press the Ctrl-+ key.
The Name, Size, Type and Modified columns will automatically adjust themselves to display all their information.
Note: The + is the one on the numeric keyboard

Added Non-Expanded Explorer when Right Clicking ..

Adding a second Explorer to the menu that pops up when right clicking on any folder or the Start Button.
This is handy to be able to open Explorer non-expanded and also for being able to open a second Explorer (non-expanded) while already in Explorer.

Open My Computer
Choose View-Options-File Types
Select the File Folder file type
Click Edit
For ACTION, type EXPLORER2
For APPLICATION USED, type C:\WINDOWS\EXPLORER.EXE /n,/e,/select,C:\
Click OK and close all windows
Run REGEDIT
Expand HKEY_CLASSES_ROOT
Locate and expand DIRECTORY
Locate and expand SHELL
Locate and expand EXPLORER2
Select COMMAND
On the right window RIGHT CLICK on DEFAULT
Select MODIFY
Remove the space and %1 at the end of the line
Click OK and close REGEDIT
EXPLORER2 will show up and launch a non-expanded view of Explorer whenever you right-click on the START BUTTON or any folder, even if you are already in Explorer.

The whole procedure can be done in REGEDIT, but this may be safer for users not experienced with REGEDIT