Läs mer 
här. Uppdateringen kommer i mitten av november.
"Other major elements included in SP1:
Loading & caching optimisations to speed up load times 
Drive command will only change junction if way ahead blocked 
Raildriver now supported 
Trainz Download Helper improvements (CDP's saved after downloading, resume function) 
Scenery auto-animation bug fixed min fetmarkering 
Scenario scripts can be encrypted 
Individual Driver Orders can be deleted 
AI bugs fixed"
Klippt från SP1 sidan hos Auran.
Roger