What I did was:
Since file read only reads in specific folders you will need to use another language to copy the file forexall.set from terminal_directory\symbolsets to terminal_directory\experts\files folder or terminal_directory\tester\files if testing, then use this code:
string s = FileReadString( handle, 6); // this will give you the first currency
And keep doing it until the end of the file.
Hope this helps.