From the B744 manual.
Flap 1 : Inboard and midspan LE flaps extend
Flap 5 : Outboard LE flaps extend and TE flaps extend to Flap 5 position
Flap 10,20,25,30: TE flaps extend to the selected position
For your question about the after landing scenario there is automatic retraction of the Inboard and Midspan LE flaps when reverse is selected. These groups will extend again when reverse is cancelled. When the flight crew retract the flaps the sequence described above is reversed.
There is also an exception to the above sequence of extension and retraction and it occurs when you are in alternate mode of operation. In the alternate mode when you start extension all the LE devices extend together and the trailing edge flaps start extending. For retraction in this case the LE devices, all of them, will only retract when all the TE flaps have retracted.
Finally as far your question on Kreugers is concerned, on the 744 only the inboard LE flaps are Kreugers. The midspan and the outboard groups are variable camber type. Therefore to answer your question the Kreugers will be retracted last of all along with the Midspan variable camber LE flaps.
Hope this helps.