A hint for newbees...
(Forgive me if I'm covering old ground - I did a search first and found nothing)
This request came from a friend who runs PCLinuxOS 2009.1 but has IP cameras which only work through an Internet Explorer interface. (yes the Chinese manufacturer lied - the say any standard browser will work...NOT!)
So we installed VirtualBox 3.06, loaded the PCs OS of birth (XP_home)

and after fiddling the security settings for IE and allowing the install of .ocx stuff the cameras worked......OH joy!
Anyway my friend gets a little confused and panics when confronted with multiple choices or sequences of more than one command, so I set up autostart to his camera interface.
Here goes>
(I assume you have already installed a Machine into your VirtualBox)
Create a Link to Application on your Linux desktop (ie....right click mouse etc)
Under Application tab, in Command>
VBoxManage startvm {name of your Virtual Machine}(eg: I used the command> VBoxManage startvm XP_home )
in Work Path>
/home/~/.VirtualBox/(where ~ is your username)
Give the link a name and choose a pretty icon etc...
Launch the icon and the OS in VirtualBox should open directly.
if you are happy all that is working, next drag a copy of the launch icon to folder>
/home/~/.kde/Autostart/and thats about it....the VBox machine is now set to Autostart each time you start you PCLinux session!
>Steve