E' disponibile per Grand Prix 4 la nuova e straordinaria versione 8.6 dell'utility 3D Editor, tramite la quale è possibile aprire tutti i files contenenti gli oggetti 3D del gioco. Questa la lista delle principali features dell'attuale release:
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New: Clone Objects New: Import/Export Objects New: Simultaneous .dat and .gp4 editing (Track camera preview is now possible) New: Update Objects Coordinates New: Kerb Description (0xCA) Command knowledge Improved: Re-designed all popup window Improved: Prev/Next buttons on .dat windows Improved: Camera facing selected object Improved: Center of rotation when mouse is in Rotate/zoom mode Fixed: Keyboard Shortcuts have been changed Fixed: Many bugs with .col files (Titles, Face Highlights) Fixed: Miss-spelled Geoff Grammond in credits