I'm not sure if your problem is with the PC that's connected directly to the printer on LPT1 or if its the setting on the PCs connecting over the network. If its the later, unless disabled or changed in the BIOS, LPT1 is the physical parallel connector in the PC so it cant be used as a captured port. There's a couple of ways to take care of this. After making the changes on the workstations make sure (as may be needed) that the LPT port matches in the DOS software setup.
1. Installing the printer from scratch.
Open the Network Neighborhood and go to the PC that has the shared device. If its not there, then there's other issues to get past first. Assuming the printer is correctly shared, right click on it and select "Capture Printer Port". If its the same OS the drivers will be loaded automatically. Select LPT2 instead of 1.
2. To correct the current settings.
Go to the printers folder and right click on the printer in question. Choose properties, then select details from the tabs across the top of the popup. There's a add port button next to where it says "print to the following port". Use add printer then select network and choose browse if the printer is correctly shared it will appear in the list. You may need to expand the list by using the plus signs until all shared printers are shown. Next put the printer on LPT2 and apply the changes.
If the printer is physically connected to the PC then use the same directions as specified in item 2 but capture tothe local port.
