The .h file should look something like this
gui.fileBrowser.lastImageDir= "your path for images" ;
gui.fileBrowser.lastScriptDir= "your path for scripts" ;
gui.fileBrowser.lastExprDir= "/Volumes/" ;
gui.fileBrowser.lastTrackerDir= "~/Desktop" ;
gui.fileBrowser.lastAnyDir= "/Volumes/" ;
Save the file as browser.h, for example, in your startup folder.
Alan.