The address of a LPT Port can be found in the Device Manager ( here for Windows 2000 ) :
To open the Device Manager, click Start, point to Settings, and then click Control Panel. Double-click System. On the Hardware tab, click Device Manager.
In the Device Manager, LPT Ports ( Printer Ports ) are listed under Ports (COM & LPT) ( in Devices by type view ). If the LPT Port does not appear in the Device Manager, then no LPT Port exist or may not be enabled in BIOS. When you are prompted as you start your computer, enter BIOS setup, and enable the LPT Port.
If the LPT Port ( i.e. Printer Port (LPT1) ) appears in the Device Manager, right-click the LPT Port name and click Properties. On the Resources tab, under Resource settings you should see the resource type Input/Output Range. The first address of the Input/Output Range is the address of LPT Port, that you must to enter in the Galep32 software ( in the picture below it is 0378 ).