With nearly all primary Adobe CS applications they offer a way to modify individual items within a group without ungrouping the item. Both Illustrator and InDesign in CS5.5 enable to doubleclick on the group which enters a mode were that item is isolated and only the contents within can be modified. As far as I can tell the only options to do this in Fireworks is to:
* Ungroup and then regroup, which is not ideal because you loose the name of the group and you have to reselect each item again afterwards to regroup
* Use the sub selection tool, which is also not ideal because it dose not allow you to target sub groups as items
Can anybody else confirm this behavior?
Try the Object extension by Aaron Beall http://fireworks.abeall.com/extensions/
You can also, instead of grouping the objects, convert them to a Symbol (Select all, then Modify > Symbol > Convert to Symbol > Graphic. The objects will then behave as a group. You can edit individual items in the group by opening the symbol in the Symbol editor. To open the Symbol editor, simply double click on it.