Inno Setup - Identify, what tasks correspond to the items of TaskList (to show text on mouse over for certain tasks only)

So, I have these comtools tasks, which, as you can see, can have a different position in the tasks list, depending on which components were previously chosen. Moreover, they may not exist at all, if the user doesn't wish to install those components. What I need is static text shown, but only when the cursor hovers over the comtools tasks.

[Tasks]
Name: "acorig"; Description: "ac original"; GroupDescription: "Choose which version of ac to install:"; Flags: exclusive; Components: ac
Name: "acenh"; Description: "ac enhanced"; GroupDescription: "Choose which version of ac to install:"; Flags: exclusive unchecked; Components: ac
Name: "ac2comtools"; Description: "ac2"; GroupDescription: "Also install community-made tools (unsupported) for:"; Flags: unchecked; Components: ac2
Name: "bccomtools"; Description: "bc"; GroupDescription: "Also install community-made tools (unsupported) for:"; Flags: unchecked; Components: bc
Name: "bc2comtools"; Description: "bc2"; GroupDescription: "Also install community-made tools (unsupported) for:"; Flags: unchecked; Components: bc
Name: "bc3comtools"; Description: "bc3"; GroupDescription: "Also install community-made tools (unsupported) for:"; Flags: unchecked; Components: bc3
Name: "bc4comtools"; Description: "bc4"; GroupDescription: "Also install community-made tools (unsupported) for:"; Flags: unchecked; Components: bc4

Yes, I did see this, but that ties the description to index, which is not practical here. Also, that code shows description for all items in TasksList.

----Edit----

So, the only change I made to the code after Martin's answer (aside from moving everything over to the tasks page) was adding Martin's function, and editing HoverComponentChanged like this:

procedure HoverComponentChanged(Index: Integer);
var 
  Description: string;
begin
  case Index of
    -1: Description := '';
    LookupTask('ac2comtools'): Description := 'This is the description of AC2';
    LookupTask('bccomtools'): Description := 'This is the description of BC';
    LookupTask('bc2comtools'): Description := 'This is the description of BC2';
    LookupTask('bc3comtools'): Description := 'This is the description of BC3';
  else
    Description := '';
  end;
  TaskLabel.Caption := Description;
end;

-1 is a failsafe, since, when one of the components in deselected, then the index for the corresponding task is -1, which means you will see the description for the first deselected component in this list, when your cursor is outside of TasksList.