Solution : https://service.sap.com/sap/support/notes/108123 (SAP Service marketplace login required)
Key words : 
additional key words industry business solution, hot packages lcps & add-ons   -->        add-, upgrades release strategy delivery dates, -h-specific add-ons, applying maintenance level/patches, -h-specific release strategy, hot packages release, repository switch procedure, /3 add-ons, delta upgrades additions
Related Notes : 
       
| 160083 | Add-on Support Packages and CRTs for IS-H 4.03 | 
| 156463 | Additional info: New installation of IS-H 4.03A | 
| 109193 | IS-H: Release strategy for IS-H SAP Releases 4.0 | 
| 19380 | General questions on the installation of IS-H |