I've attempted to unzip the vncviewer.ph.gz file in a couple of ways, but all unsuccessfully.
I've tried WinZip - says the archive is invalid.
I tried to gzip - says it is not in valid gzip format.
To ensure the archive really isn't corrupt, I've downloaded it from both http://www.audreyhacking.com/files/vncviewer.ph.gz and http://www.nexwarecorp.com/programs/vncviewer.ph.gz
Same results on both.
I cannot locate gzip on Audrey/QNX