It is me again. Sorry, I just can't get this.
I have put lit2mobi.exe and convertlit.exe, renamed to clit.exe, and a.lit, my test lit file, into a directory on my desktop. I copied the path to the directory as Harry wrote.
I ran the cmd.exe command and the window appeared and I typed lit2mobi.exe a.lit
It appeared to run and asked me to open the .lit file. I clicked on it and it kept asking me. Eventually I gave up. It said the following
Unpack file a.lit in dir ctmp
Read in HTML tree from opf
Opf: Initialize from a file: a.opf
Could not open opf file: a.opf
Any more suggestions?