If you attach your LTspice SIM, more members will be likely to take a look at it. If you've customized any symbols, models or libraries for the sim, zip them up with the .asc file. Don't include any sim result files as they'll bloat the zip file. Otherwise just attach the .asc file.
N.B. order of preference when choosing models for LTspice:
LTspice specific > SPICE 3 > any other proprietary SPICE that has its own extensions to SPICE 3 syntax.
PSPICE models can be a PITA to convert, but at least PSPICE is well documented.