Probably this is important also: this is not a hard drive, it's a vmware vmdk virtual drive which is currently mapped to another virtual machine as additional disk.
If you access this disk as any other disk (meaning, from VMware or as a virtual disk, not as a file on a disk somewhere) it shouldn't make a difference; VMware treats the virtual disk as any other hardware disk, and therefore so does iRecover.
The red indication doesn't necessarily mean bad things, it just means that the file could not be validated. You have one option: try. Remember, if you buy a license and things don't work out, we have a refund policy. Read more here:http://www.diydatarecovery.nl/FAQ_custservice.htm#F3
But, as stated in the thread you referenced, be prepared for the worst.