See
http://puppylinux.org/wikka/HowtoAddSFStoFullInstall
Is this description correct?
Adapted from
http://puppylinux.com/development/compileapps.htm
Full hard drive installation
This is a conventional Linux installation.
Currently, installing the "devx" file in a full hard drive installation (as opposed to a "frugal" installation) is slightly more complicated, and you can't undo it. It involves some steps....
1. Click on the devx_xxx.sfs in a ROX-Filer window to mount it.
2. Open a terminal in the mounted directory.
3. # cp -a --remove-destination ./* /mnt/hda2/
4. # sync
5. Close the terminal.
6. Click on the devx_xxx.sfs file to unmount it
Note, the '--remove-destination' option is essential. If you only use '-f' to force overwrite, it will follow (dereference) a symlink, that can cause unexpected overwrites.