Just19 - your quote
I installed pclinuxos on usb stike like a hard drive by vitualbox and everything perfect.
I start the livecd from vitualbox and install in the USB stick (no Live USB Creator).
You seem to be addressing a normal install of PCLOS to a USB drive and not a live install.
They are competely different.
Why use VBox for such an install when it can be done directly by booting the CD? 
Please forgive the ignorance, but I was not aware that PCLos could be installed to a USB stick as a normal install,
thought it could only be by Live USB Creator.
Is it a case of installing the same way as to a hard disk, but pointing the installer to the USB stick after the partitions
have been created on the stick ? I assume that installing grub to the stick makes it bootable ?
Yes to just about everything.
Just select the required device from the list when installing ..... and ensure that Grub is written to the MBR of the same device.
I would make one suggestion though ..... create the partition/s yourself rather than rely on the default setup of the installer.
You will need a larger flash stick to accomodate a full install than a live install. The OS is decompressed when being installed.
I suggest just the one partition for the OS ..... and maybe use a Mini release.
Another item to be aware of is the background writes to the OS.
This can be hard on flash sticks and may induce premature failure of the stick.
I am unsure what the defauls are for mounting the '/' partition these days ..... but for a flash stick it should be advantageous to have 'relatime' option present. (it may be part of the defaults, I don't know).
Also you need to ensure that the fstab file does not contain anything other than what will be on the stick ....... no partitions from the present PC for instance, else when inserted in another PC it will be searching for those (now absent) partitions.
In addition, the menu.lst entry for one PC may not work without editing on another PC .... depending on whether devices are attached or not.
regards.
