Can't say whether xfwm4.tcz is unusable but it may be more complicated than some window managers. That's why i suggested just setting up something simpler. Can only speak from personal experience jwm.tcz, fluxbox.tcz and openbox.tcz are known to work well.
Since you already have Openbox downloaded, ensure all of these extensions are downloaded into /optional, listed in onboot.lst, reboot and test:
Xorg-7.7.tcz
Xprogs.tcz
xf86-video-vmware.tcz
xf86-input-vmmouse.tcz
openbox.tcz
aterm.tcz
NOTE: There is no xf86-input-vmware.tcz in TC 6, it's called xf86-input-vmmouse.tcz. This most likely explains why you're not seeing a mouse
Of course default Openbox doesn't show much, right-click on screen to see whether menu appears.
Don't know if you still need another xf86-video-*.tcz driver for your particular hardware, not familiar with VMware.
Highly recommend reading the Core manual, linked on home page, and start with a simple setup to start.