Parallel Tools won't reinstall in Ubuntu 10.10 after upgrade to Build 6.0.11990

Installation of Ubuntu 10.10 under an earlier Build 6 Parallels VM version was trouble free. Now, after upgrading to Build 6.0.11990, setting "Update Parallel Tools" in the VM, then using the instructed method of navigating to /media/Parallel\ Tools, entering su mode, and then typing ./install gives rise to "Error: you do not have permissions to run this script."
ls -l install shows permissions of -r-xr-xr-x
Even chmod can't help, since the mount point is read-only. Anybody seen this and have a work-around?

 

Ignore Parallels manual, use standard practices instead

It occurred to me to just try
sudo ./install
rather than entering su mode and then separately typing "./install" without the leading "do", which is what the Parallels manual instructs. Worked like a charm! So, in summary, after navigating to the /media/Parallels\ Tools/ folder, simply type
sudo ./install