In a new blog post Tony Bibbs talks about an issue that he's been having (an "oh so familiar problem") when trying to install the Zend Studio Neon IDE - the same as last time, an issue with a locked resource.
The fix this time was a bit more cumbersome because the unpacking of files happens during the install not when you explicitly uncompress the tarball. However the Internet proved to be a valuable resource again as I found the fix from a blog by someone overseas.
The solution involved breaking the installer (pushing it to the background for a bit) at a certain point, executing a command to replace the variable name and resuming the install process to complete a correct software installation.