The iGO in this thread is very old now - released in May 2009.
The time that GPS devices were low on memory is gone too. Memory chips are cheap.
Unless your device is older, the only use of this thread is a good read. and even if you do have an older and/or a low memory device, there are more modern solutions.
Like this program : http://www.navitotal.com/showthread.php?10941-iGo-8.3.5-Minimal-for-low-power-devices-TBM
How to install ...