I have been installing lots of virtual machines on my FREE VMware ESXi server. Most guest OS's install great but I had a problem with Windows XP Pro 32-bit.
When you go through the install Windows XP does not find any hard disks and therefore will not install.
What you need to do is download a file called vmscsi-1.2.0.4.flp and then in the virtual machine setup make sure the floppy setup looks at the contents of the zip file. Then press F6 during install and it will read the file and then find the virtual hard disk.

I came across several errors whilst trying to install VMware server 1.0.2 on Ubuntu 6. Below is the error messages and their corresponding solutions:

You'll probably get asked for xinetd, make and GCC so get those first

sudo apt-get install xinetd
sudo apt-get install build-essential

sudo apt-get install linux-headers-`uname -r`