Installing the desktop version of BT747 for GPS control is fairly easy through the 'Java Web Start' system.
This system works on Windows flavours, MacOS and Linux.
To download zip files follow this link.
For easy installation (RECOMMENDED!), use one of these links:
Try the desktop version of BT747 or Install the desktop version of BT747
Try the development version, Install the current development version or keep it up to date automatically.
In case of trouble with the serial link: BT747 Latest using RxTx 2.2pre2 (RxTx dev version) for Windows 32 & 64 bit, MacOSX, Linux or Install the development version using RXTX2.2pre or Install the stable version using RXTX2.2pre