Re: How to download .h files to work sensors?
Download the latest version of the 3rd Party Sensor Drivers written by Xander Soldaat (aka mightor on these forums) here
and use #include "(drivername here).h" to include these drivers into your program
If you have done this maybe you aren't including a driver you need or you have the files somewhere else. Post your code so we can help you out if you have any other problems. What sensors are you using specifically?