While there aren't manyare only two EXE files in c:\windows\sua\bin (just cat32.exe and fileinfo.exe) and a load of commands that would run but are missing an EXE extension!)
C:\Windows\SUA\bin>dir
Volume in drive C has no label.
Volume Serial Number is B411-D580
Directory of C:\Windows\SUA\bin
17/11/2014 11:09 AM <DIR> .
17/11/2014 11:09 AM <DIR> ..
18/01/2008 06:09 AM 172,032 at
18/01/2008 06:09 AM 172,032 atq
18/01/2008 06:09 AM 172,032 atrm
18/01/2008 01:45 AM 396,288 awk
18/01/2008 05:41 AM 115,200 banner
18/01/2008 01:45 AM 105,472 basename
18/01/2008 06:09 AM 172,032 batch
18/01/2008 07:01 AM 141,824 bp
18/01/2008 06:05 AM 46,605 c89
18/01/2008 06:05 AM 117,760 cal
18/01/2008 06:05 AM 140,800 calendar
18/01/2008 01:45 AM 118,784 cat
18/01/2008 01:45 AM 155,648 cat32
18/01/2008 01:45 AM 155,648 cat32.exe
.....
There are EXE files for 'all'not all but most of the commands, in c:\windows\sua\common
AndThere are some e.g. awk which don't have an exe file but are in c:\windows\sua\bin and you don't have to rename them to run them, they run from an SUA shell e.g. start..programs..subsystem for unix..c shell then ls /bin and awk shows there.
Also, I hadn't noticed initially but installing SUA does add C:\windows\sua\common\
and c:\windows\sua\usr\lib\"
(with a trailing backslash oddly enough), to the path.
I hadn't noticed because in order to ensure they were running I had done set path= and setting the path to the c:\windows\sua\bin directory. Because I wanted to make sure gnuwin32 and cygwin binaries didn't run, for my test. What I then did that helped, was I echoed the path to a bat file and prepended set path= to it , so the bat file sets my path. Then I edited out gnuwin32\bin cygwin\bin if there. And I set my PATH. Then it worked, because I had c:\windows\sua\common in my path. I hadn't realised that the EXEs were there, I figured they'd be in the bin subdirectory, which did indeed have files for all the commands, just with no exe extension.