They all install fine for me, and everyone else that uses them. You do know that you have to Apply them?
Open any cash table, click on the chip rack for table options, then:
Choose Theme > and find the new theme and Apply.
The deck has to be activated by going to Choose Theme > Deck > Simplified.
Try watching this video, and see if it helps.
Themes Install Help Video
Otherwise, as I mentioned before, please PM me your AIM/MSN name - tomorrow - and I will walk you thru it. If necessary, I can use Teamviewer for Remote Support and get them installed and working in a matter of minutes while you watch me.
I have never, not been able to get them fixed for someone.