Hi,
The changes I made to the text:
"* Go to:admin/settings/image/image_fupload and Save settings. (This will prevent you having "next step's" page not fund probem)

* If you do not have image galleries taxonomy terms created then go to: admin/content/taxonomy
and "Add term" to Image gallery.

* To upload images into the gallery: Go to admin/content/image and
start creating them. Add images and select which galleries they should go under."

Sorry, I'm not good with Git.

I had next step page not found on test install on brand new components, so this text shoud clerify for others to be able to install this great modue more smoothly.
Changes below.

Thanks

Flash Gallery for Drupal 6.x: Installation instructions
-------------------------------------------------------

Install steps:

* Download flash gallery module and unpack it to your site's modules
directory.

* The simpleviewer swf player is included in the package. As well as the swfobject.js
You can download the latest version from Airtight Interactive
(http://www.airtightinteractive.com/simpleviewer).

* You will notice that the viewer and swfobject are located in the
directory called 'simpleviewer' (modules/flash_gallery/simpleviewer/).

Your directory and file structure should look like this:

modules/
[... other module directories ...]
flash_gallery/
flash_gallery.css
flash_gallery.info
flash_gallery.module
INSTALL.txt
LICENSE.txt
simpleviewer/
swfobject.js
viewer.swf
translations/
flash_gallery-module.hu.po

* Enable the module @ administer > Site Building > modules. It is
listed in the Media section, and needs image and image_gallery
enabled first.

* Change the settings @ administer > Content Management > flash galleries

* If you already have some image_gallery galleries with images in them, check
'build thumbnail library' in the miscellaneous section and hit save

* Go to http://yoursite.com/c to adjust properties.
If you already have image galleries createdm then you will need to rebuild
the thumbnails. Click on Miscellaneous and check "build thumbnail library.
You can also change dimensions, colors and layout

* Go to:admin/settings/image/image_fupload and Save settings. (This will prevent you having "next step's" page not fund probem)

* If you do not have image galleries taxonomy terms created then go to: admin/content/taxonomy
and "Add term" to Image gallery.

* To upload images into the gallery: Go to admin/content/image and
start creating them. Add images and select which galleries they should go under.

* Navigate to http://yoursite.com/fgallery to see the module in action

* Suggestion: set a path alias for fgallery

* Suggestion: disable all blocks on fgallery/* as this will give you more
space to display your albums