Make sure you select the data immediately before running the insert image commands, and don't have any other objects selected. We may have a work around for this in the future. This was a bug. It is fixed in the 1.1 release version. If you have an opinion on this, please contact us .
Units relating to angles end up being dimensionless.
However, if you want to add to an existing class, like pressure, you are out of luck. Please write us what, if any, units are missing and we will provide them to you. Use the ElemIsotopeMass function. Your Antoine vapor pressure calculation is wrong. This is fixed in the 1.3 release.