if the software was infact free with open source always available then i can not see any issues with it, you could of course host this on your own website but feel that the rules allowing free distribution including source code have to always be available, also any updates including variations on it have to even if you discover some miracle new way of mapping cars. also i beleive you have already had this discussion with the admin on here so why resurect the topic ?

if you have the correct information and construct your articles in such away that there are no infringments on interlectaul copyright, actual copyrights or publishing of confidentual information the so long as its in the correct area there should be no problems.
if the topics move away from your original idea in anyways as to slander, or disrepute any trading company then they will be removed.

alternatly why not do your write up and allow the admin to verify that there are not going to be any issues with anything and go from there.
as to be honest i expect there are going to be some issues due to the possible depth that you could go into .

im sure that my answering is just speculative and a ruling would have to be decided by the website admin team rather than the moderators and have flagged this topic for their attention.

please do not use this reply in anyway to use it as a decision from the passionford.com webteam but just as a curtious reply to your orig comments.
thank you for your time and i hope you get a reply to this as soon as possible.