Sure is. But it's a work-around at this stage.
1. Export a demo copy to Access to work with. I have attached an exported one you can use (inside the zip file YaYa.zip) if you don't know what I mean.
2. Cut and paste from the excel sheet you have your data in into the right columns of the exported access sheet which you have open using MS Access (keep column titles, etc).
3. Literally rename the edited (i.e., originally exported) Access data sheet from ***.mdb (e.g., Myexporteddata.mdb) to ***.met (e.g., mydata.met).
4. Open the new edited Access file with the ESG.
A bit laborious, but it works.