If you guys aren't just after orkz this pack is available
http://forums.datarealms.com/viewtopic.php?f=61&t=29688
It does have the orkz, but I suspect its missing a thing or two.

Thanks! The Orks and Imperial Guards work great! Necron's and Tau don't work, and cause the game to crash before startup. Most likely due to the fact that I'm on Mac. I didn't need space marines installed as I already have them and the weapons from another pack. Got what I needed!

Yeah... dude's version removed a lot of stuff (or maybe he got his copy of a previous version of this mod).
In either case it would be nice if I could deploy a gargant to the battlefield, that's not possible to do with dude's pack.

Well I just tested this pack, and it doesn't seem to be working for me. Not surprising when you consider it's b23.
If I go crazy enough I could try adding some of the units from this as addon's for the other pack, but even then there may be other errors.
Like the infamous o-ray which will lag your game to unplayability in a very short time.
My advice pm the authors of the mods and ask them.