You can create statistics for the other places using the Custom Statistics. See the
Tutorial: Using Custom Statistics and Reports for general details on custom statistics. You'll want to be creating a new column cnt_finish_x where x is the new finish place - duplicate cnt_finish_3 and change the name and expression to 4 for fourth, 5 for fifth, etc. Then create a new stat by duplicating 3rd place and changing the Name, Definition, Value Expression, and details on the Format Tab appropriately.
For your second question, yes you can do this via the Player Ranges section on the Hud Options tab. Click Configure --> Configure Hud and on the Hud Options tab add new ranges for the data you want to see. If you add a range for 7 to 9, you'll only see data from 7, 8 and 9 handed hands when playing 7, 8 or 9 handed. You can add these ranges in any configuration you would like, but you cannot have them overlap (so you can't have a 4 to 6 range and a 5 to 7 range).