After you upgrade to Fedora 18, whenever you try to install vmware tool, you will receive the following error.
Searching for a valid kernel header path...
The path "" is not a valid path to the 3.7.4-204.fc18.x86_64 kernel headers.
Would you like to change it? [yes]
I believe you already got kernel header, so all you need is to link the header file by using the following command
ln /usr/src/kernels/3.7.4-204.fc18.x86_64/include/generated/uapi/linux/version.h /lib/modules/3.7.4-204.fc18.x86_64/build/include/linux/
Launch the vmware-config-tool.pl again, the error will gone.