FSLCD HELP and TIPS

Hi I am looking at experimenting using FSLCD with the LCD to Parallel circuit. Iam also currently experimenting using LPT Switch. While there is some information available, there appears to be some areas of FSLCD's capabilities, which are not clear. Seeing as there must be many of you who have been down this road already, I'm hoping that you can be of help.1. The / LCD to Parallel circuit combination is generally said to support 2 x LCD Modules, on a single parallel port. Is there a character limitation to this? Are 2 x 40x4 Modules Supported? There has also been some written of up to 3 modules being used on a single Port, but no circuit, or details of any limitations have been found.2. Has anyone successfully set up multiple instances of the LCD to Parallel circuit to a single computer using LCD to Parallel circuit.3. Has anyone modified the circuit, and or software so that USB can be used instead of the Parallel Port.Thank You In Advance