1. You may want to go back to PS2 mouse, and remove the USB card, unless you'regoing to use it for othjer things, as there's no PCI slot left fora sound card. Be aware, I hung my LX booting up with an ISA AWE64 in it, soI'm not sure how good the ISA support is... :-\
FYI. I run a pair of ISA AWE64 sound cards in my 164LX. It has worked fine with that configuration for more than 5 years.
Bob