This HOWTO written by aimass@ccs.net-a1

I would like to contribute with a mini how for dummies on how to install
the plustek9630.0.30 driver with SANE.
The instructions are very similar to the ones you provide but with a few
minor changes, and a bit more explicit.

Here is what I did:

1) Obtain plustek9630.0.30.tar.gz from rick's site.
2) Obtain sane-1.0.1.tar.gz from freesoftware (do not rpm install, this
will be a /usr/local/ install)

3) Unpack sane.
4) In some temp directory unpack plustek9630.0.30.tar and do the
following:
     4a) In this same directory create a directory called "backend" and
put all the stuff there including the plustek_driver sub dir. (I suppose
Gerhard forgot to tar it from this level)
     4b) Pack it back again into plustek.tar for example. Your tar ball
should now contain a directory called backend and inside that directory
you should have some plustek.c and
            other source files, and there should also be a sub dir
called plustek_driver. Tip: You can browse inside your gz and tar files
with mc (Midnight Commander).
     4c) Keep this newly created tar ball for later use.

5) go into the sane directory (from step 3)
6) Type CFLAGS="-g -O -Wall" ./configure
      please note I have not included the --disable-shared option of the
script for the Plustek 9630 driver. It did not work for me.
7) Once the configure script is complete take the tar ball from step 4
and copy it to the sane directory (at the same level where the configure
script is) and unpack it there.
     This is what will happen: The Makefile in the backend directory
will get overridden by the one from the plustek driver. Please edit this
make file and make sure that prefix
      is pointing to /usr/local
8) Go into backend/plustek_driver and do:
     8a) make -f Makefile
     8b) su
     8c) make -f Makefile install
     8d) make -f Makefile unload
     8e) make -f Makefile load
     8f) Type lsmod and make sure that the module has been correctly
loaded (you should see pt_drv in the list. By the way you have do su -l
to have access to lsmod)
     8g) The low level driver and device have been created. In my
scanner the light turns on at this moment.

9) Go back to the sane directory (../../) and do:
      9a) make
      9b) Please sit down and watch the compilation process. If you get
a /usr/bin/ld parse error (with the .lo files) you probably used the
--disable-shared switch. Be specially
             careful when it's compiling the backend directory. If you
see sharp, cannon, hp and so forth you probably did not complete step 7.
If you get some "no such file ...." error
             check out the Makefile inside the backend directory. Since
this one was not generated by the configure script you will have to
revise it manually. Also check plustek.c
              and related files and take a careful look at the includes
section. Make sure the sub dirs. are all pointing to the right places.
       9c) After it's all done and you got NO errors check the .libs
directory that's inside the backend dir. It should only contain plustek,
dll, net, pnm, and libsane. If it contains
               many more something went wrong in step 7.
       9d) su
       9e) make install
       9f) exit (leave super user)

10) If you've got /usr/local/bin on your path try scanimage at this
time. You may have to check your LD_LIBRARY_PATH and include
/usr/local/lib/sane. I usually edit the .bash_profile
       file in my home directory.