Yet another newbie question

Hello list,

well, I'm stuck with yet anther (probably) ridiculously easy problem. As 
you may have seen in my last post, I'm currently just using RC 
components - which gets boring fast ;-)

Now I wanted to use a diode, for example. However I have to specify a 
model as a value - now one really silly question is: How do I find out 
what models are available for diodes? I tried some standard values like 
1N4001 and 1N914 none of which were recognized.

Is there also a way to use operational amplifiers? I'd guess that would 
be the "U: Logic Device" family in analog mode, but again - the problem 
with knowing which models are supported. Tried the LM324, but no luck again.

Thanks for your patience...
Kind regards,
Johannes