You should also use the parameter --ignore-errors and you won't have any of those issues. Nevertheless if you are not using Slackware-Current, I suggest you to use VMWare Player 5.0.1
Also you might like to add the following lines to your rc.local in order to run vmware services at boot time.
#VMWARE
/etc/init.d/vmware start
#USB Vmware
/usr/bin/vmware-usbarbitrator
(USB Daemon is not started automatically, and this is the reason why the installer fails. However it can work like a charm if you start it manually)
Hope this help you out...
There is an URL to a Slackware Community on G+