According to this:
https://community.logmein.com/t5/Central/Ignition-command-line-parameters-to-get-to-computers/m-p/112661#M1783
There is no direct way, with EXE's to launch a log me in session to an asset with command.
However, if you collect the log me in serial number, you can open a web page to the item:
https://secure.logmein.com/mycomputers_connect.asp?hostid=LOGMEINID
Where the LogMeInID is a value we extract from the registry of the comptuters that is their LMI serial number.
This would be useful when they are out of the office and remote desktop/support assist isn't an option.
Sorry for the excessive use of smilies,
Joseph