Hello I think DVDStyler should have a live preview setting of the menu's being created. This could be done by pluging in a media player and ataching instruction to play said file in it's directory without the need to transcode since the files are already located by the program.
1) make menu for DVD
2) Press options --> active menu preview
3) Automatically opens media player (integrated) That recognized the menu and when you click on the options it locates the files (already located when you put them in DVDSTYLER to be transcoded) and playes them and all the options in their original format for previewing without having to transcode before hand.
*In reality it would work just like a macro since the raw instructions and file directories are already there when you set up the DVD for creation it just saves time since no transcoding/burning is necesary.