If {Command.Data} is a datetime field, then use a formula like:
if {Command.Data} = datetime(2099,01,01,0,0,0) then "Total" else totext({Command.Data},"MM.yyyy")
However, if this results in incorrect sorting, then use {command.data} as your crosstab column, and while you have it highlighted within the crosstab expert, go to "group options"->customize group name->use formula as group name->x+2 and enter the formula there. This will allow the correct sort.
-LB