i got it working under Wine in Linux with no problems at all..... it's one of the few windows programs i've got running in linux that runs with no hiccups at all.
you can draw 45 degree symbols for LTSpice and use them, but i'm not sure yet how to link them properly to the device selector, so i can for instance change a bridge of 1N4004s to MUR820s. so far i have to make a separate symbol for each diode type....
i've added libraries of parts and models and made heirarchal circuit modules that i just have to drop into a schematic and wire it up, like a sine wave oscillator and a bipolar current source. i also made an audio power amp "front-end" that just needs power, inputs, compensation caps and an output stage. it allows me to use a "standardized" input stage to test ideas for output stages.