Just a heads up that the D6 system is now 'open' under 'OpenD6'. You can obtain all of the materials in PDF form here:
http://www.wegfansite.com/forum/showthr ... Books-Link(make sure to page all the way through that thread, as additional versions are added from time to time). Also note that drivethrurpg has the core D6 Adventure, D6 Space, and D6 Fantasy available for download for free as well.
There is an extremely active OpenD6 fan site here:
http://www.wegfansite.com/forum/forumdi ... sion-ForumAlso, for my Tekumel specific conversion notes go here:
https://docs.google.com/document/d/1H4N ... t?hl=en_USThe notes I created are based off of D6 Fantasy, so that's a good D6 doc to review before looking over my campaign d6 notes.
Overall, D6 is an extremely system to jump into and tinker with.