undoInfo -ock/cck in Maya2008?

[highend3djojan-]

Hi,

'undoInfo -ock' and 'undoInfo -cck' combination can be used in Maya2009 MEL procedures to
consider the whole set of commands (between them) inside the procedure as a single entry in
Maya's undo queue. But this ock/cck flags are unavailable in Maya2008. So what can do in
2008 to achieve this result? Or what can we do in Maya2008 to take a complete procedure as
a single entry in undo queue?
Thank you.

[highend3djojan-]

Hmm.. it can be done using MDGModifier class (commandToExecute, doIt, undoIt).  BUT!!

How can I add this undoIt/doIt to Maya's undo/redo queue? i.e; if we call MDGModifier's doIt() once and then do 3 actions on viewport, then if we press ctrl+z repeatedly, will MDGModifier's undoIt() be called after undoing the 3 actions by any way? How can i map ctrl+z to this undoIt() like this?

Plz help.