While installing Vmware Workstation on Fedora 8, i got this error:

Using 2.6.x kernel build system.
make: Entering directory `/tmp/vmware-config1/vmmon-only'
make -C /usr/src/kernels/2.6.23.1-42.fc8-i686/include/.. SUBDIRS=$PWD SRCROOT=$PWD/. modules
make[1]: Entering directory `/usr/src/kernels/2.6.23.1-42.fc8-i686'
CC [M] /tmp/vmware-config1/vmmon-only/linux/driver.o
CC [M] /tmp/vmware-config1/vmmon-only/linux/hostif.o
CC [M] /tmp/vmware-config1/vmmon-only/common/comport.o
CC [M] /tmp/vmware-config1/vmmon-only/common/cpuid.o
CC [M] /tmp/vmware-config1/vmmon-only/common/hash.o
CC [M] /tmp/vmware-config1/vmmon-only/common/memtrack.o
CC [M] /tmp/vmware-config1/vmmon-only/common/phystrack.o
CC [M] /tmp/vmware-config1/vmmon-only/common/task.o
CC [M] /tmp/vmware-config1/vmmon-only/common/vmciContext.o
CC [M] /tmp/vmware-config1/vmmon-only/common/vmciDatagram.o
CC [M] /tmp/vmware-config1/vmmon-only/common/vmciDriver.o
CC [M] /tmp/vmware-config1/vmmon-only/common/vmciDs.o
CC [M] /tmp/vmware-config1/vmmon-only/common/vmciGroup.o
CC [M] /tmp/vmware-config1/vmmon-only/common/vmciHashtable.o
CC [M] /tmp/vmware-config1/vmmon-only/common/vmciProcess.o
CC [M] /tmp/vmware-config1/vmmon-only/common/vmciResource.o
CC [M] /tmp/vmware-config1/vmmon-only/common/vmciSharedMem.o
CC [M] /tmp/vmware-config1/vmmon-only/common/vmx86.o
CC [M] /tmp/vmware-config1/vmmon-only/vmcore/moduleloop.o
LD [M] /tmp/vmware-config1/vmmon-only/vmmon.o
Building modules, stage 2.
MODPOST 1 modules
CC /tmp/vmware-config1/vmmon-only/vmmon.mod.o
LD [M] /tmp/vmware-config1/vmmon-only/vmmon.ko
make[1]: Leaving directory `/usr/src/kernels/2.6.23.1-42.fc8-i686'
cp -f vmmon.ko ./../vmmon.o
make: Leaving directory `/tmp/vmware-config1/vmmon-only'
Unable to make a vmmon module that can be loaded in the running kernel:
insmod: error inserting '/tmp/vmware-config1/vmmon.o': -1 Invalid module format
There is probably a slight difference in the kernel configuration between the
set of C header files you specified and your running kernel. You may want to
rebuild a kernel based on that directory, or specify another directory.

For more information on how to troubleshoot module-related problems, please
visit our Web site at "http://www.vmware.com/download/modules/modules.html" and
"http://www.vmware.com/support/reference/linux/prebuilt_modules_linux.html".

Execution aborted.

Can someone please help me out what to do?

Thanks
Anurag

hello
there is possibility that virtualbox would install with no problem,

maybe your kernel version has problem with module

From what I can see the Kernel version is not supported by VMWare, this is not surprising given that this is I believe an unsupported version of Fedora, I believe either version 12 or 13 is the current version of Fedora, version 8 is no longer supported as far as I am aware as I believe Fedora only has either an 11 or 13 month "support" what means version 8 may have unpatched known vulnerabilities.

In my experience installing vmware requires a kernel patch. Do a google for for "vmware any-any-update" and you might find the appropriate patch for Fedora 8 but as already mentioned you have a version of Fedora that is no longer supported and so an upgrade (if possible) would be better. Fedora 13 is the latest version.