Workstation6.0.2も同様の現象だった。
http://communities.vmware.com/message/757471#757471
"The current amount of free space on the hard disk (14.4 GB) is not enough to create the specified disk file: WinXPPro.vmdk. Please choose a different location or specify a smaller disk size."
As a workaround change to the directory (cd ) where you want the VM to stored.
Use vmware-vdiskmanager to create a virtual disk
上記を参考に作ったが、V6形式のDiskのようで
V5互換のvmには接続できなかった。
The selected virtual disk is incompatible with this Workstation 5.x virtual machine.
Adding this disk will make this virtual machine incompatible with older VMware products
うーむ。