Next, slice the individual buttons for ImageReady import.
Now there's a few options and things to consider here before we begin.
'Slice from Guide' or
'Layer Based'! What about the surrounding empty data (white space)?
Decisions you have to make before you bring them into final production.
I'll just deal with the Slice methods for now and move onto the rollovers.
Slice from Guide: Position guides around all the 'Shape1,2,3,4' elements. (As I have captured below)
Once that is complete, select the 'Slice Tool (K) from the ToolBar and up on the 'Options Bar' choose 'Slices From Guides'.
That will produce a slice order as below.
Main Benefit of this method: As you can see this option takes care of the surrounding empty data. And this feature is not in ImageReady so this decision is obviously made here first.
Layer Based Slice: Select 'Shape1' layer, and go to 'Layer/New Layer Based Slice'. Repeat process for the other three shape layers until you have the below.