I believe Ozzy summed up what I would have said before I could even attempt it i.e. no use for cloud users as they can't use them and if using a trial that will expire whats the point? I mean to test sure but why go through all that trouble instead of simply asking or calling them to inquire directly? If they refer you to vbulletin.org on the phone for modifications and customization questions then ask
here.
There are two pre-sales forums for use, one on vbulletin.com and a different one on vbulletin.org:
http://www.vbulletin.com/forum/forum...ales-questions
https://vborg.vbsupport.ru/forumdisplay.php?f=26
The reason two exist, is so that you can ask generic pre-sales questions on vbulletin.com, if you wish to modify your site or do something outside the box then its actually better to ask here, so that is why there is similarly named forums yet each has different threads and replies. This site is every vBulletin customers resource/tool so even if you can't download modifications as a cloud or trial user the two forums you require are open.