Maybe I've been misunderstanding GDC's responses...
According to
http://forums.usfirst.org/showthread.php?t=8575 and
http://forums.usfirst.org/showthread.php?t=8270, this would not be allowed. I had read some of these posts, but there is some contradictory information.
The following post:
http://forums.usfirst.org/showthread.php?t=8314 says that you
can use commands to set registers, which would then execute four different commands. This is what I was thinking of when I made the statement quoted above.