How to hide the column the grid is grouped by? +additional grouping questions

Hi

When the grid is grouped, the grouping column is visible with the same 
values in each cell of each group. Looks weird and confusing.

How can we accomplish more efficient look and hide the grouping column? 

See attached pic and here: http://demos.devexpress.com/aspxgridviewdemos/GroupingSorting/Grouping.aspx 

2nd question:
Is it possible to customize the group header cell? 
Instead of default template "{ColumnName}: {GroupName}"
I need something like "{ColumnName}: <b>{GroupName}</b> – <span class="groupRowCount">({Count} my text)</span>"

Thanks!