A FAXCOM Queue cannot be installed using a hidden share, however after installing the FAXCOM Queue, it can be converted to using a hidden share.
1. Change the entry in the FAXCOMNetworkData by appending the $ at the end of the Queue name
2. Remove the created UNC share and add a new one with the same name plus an appended $
3. In HKEY_LOCAL_MACHINE\CUrrentControlSet\Services find the Queue entry and rename it by added the $ to the end
4. Re-boot the system