How do I get the VirtualBox host file system to automatically mount at startup? Into which startup file do I place the mounting instructions?

[Later...Perusal of the Internet resulted in finding a suggestion to place the mount command in the /etc/rc.d/rc.local file. Guess what! It works!]

I'm running Windows 7 Ultimate on my computer. I've installed VirtualBox 3.0.12, and I've now installed Puppy Linux 4.3.1 inside of VirtualBox. Using the VirtualBoxAdditions pet mentioned at the start of this thread, I've installed the Guest Additions. However, as things stand, I've only gotten the ...