Here's a brief guide for iPAQ: 1) make sure Wifi is ON. 2) bluetooth should be OFF. 3) you have to be able to see more than 3-4 GPS fixes on the bottom of the wififofum software. 4) Without available GPS coordinates, wififofum does not save correctly. 5) GPS should set to use COM7 in the option menu. 6) select the device on the menu if no AP data is displayed and power device on if still not showing any. 7) If nothing seems to work fine, please restart the iPAQ (bottom for outside keypad one, top for the HP travel companion) 8) you should save the file in a format of .wis but the file you need will be located in the root directory with the name like "-231245.txt". 9) you need to transfer that file(e.g. -231245.txt) to your computer before returning the device. The following is for bluetooth GPS: 1) make sure bluetooth GPS is on (green light). 2) after connection, bluetooth GPS has a bluelight. 3) upon receiving GPS coordinates, bluetooth GPS will show a white light. 4) connection from a laptop to the bluetooth GPS should be performed with custom settings to connect through COM6 (in most cases). 5) netstumbler running on the laptop should have the same COM port set up with the bluetooth setting. 6) this one does not require to use wififofum, only netstumbler on the laptop.