Ken
On your second point first... KMZ is a very broad format. MapRun needs the contents to be the same as produced by OCAD (the default Orienteering Mapping system). The format is described at:
http://maprunners.weebly.com/uploads/6/8/6/6/6866500/technical_overview_-_extract_-_file_formats_v1.pdfOn your first point... I have a backlog of feature requests.... so I wouldn't get this that anytime soon.
Have you tried sites like:
https://pdf2jpg.net to convert the pdf to jpg? (I haven't used this recently - but it might be worth a try).
Also you might find it easier to use the desktop version of the "Create KMZ" function, rather than using the one in MapRunF on a small phone screen. Have a look at:
https://console.maprun.net.
Peter