Is there a way to find out how many sectors a cdi has???

[radeon_x]

Use this command to get info about a CDI file:

D:\cdirip.exe D:\game.cdi /info

As for burning games with 300 sector tracks - I feel your pain. Have you tried the "Echelon self-boot tutorial" method, I've found that it's the most reliable method - although it is time consuming. I'm pretty sure it will work with all games with the exception of the Euro games that have LBA protection...