download manager sourceforgeFallout mod manager issue?

I'm using New vegas and fallout 3 FOMM, but for some reason it's only working with new vegas and when I try to use fomm with FO3 it says "unable to get write permissions for: C:/program files(x86)/bethesda softworks/fallout 3/data
PLEASE READ
C:/program(x86)/GeMM/data/readme-fomm.… for solution"
I don't understand the directions for it----

Name: Fallout Mod Manager
Version: 0.11.0
Category: Utilities
Author: Timeslip, Q
Source: http://sourceforge.net/project/showfiles.php?group_id=247976
Forum: http://sourceforge.net/forum/?group_id=247976
Homepage: http://sourceforge.net/projects/fomm/

Description
===========
A collection of utilities for mod users and creators. Included are tools for one click mod installation and removal, load order manipulation, esp editing, bsa creation and extraction, sdp editing and more.

Manual Install
==============
First extract the .7z archive to a location of your choice. (Which presumably you've already done, or you wouldn't be reading this. :p) Make sure you keep the directory structure intact.

If you only have a single, retail DVD install of fallout 3 you can run fomm from anywhere; the only restriction is that it needs to be somewhere that it has write access to. If you have multiple installations, or you are running a downloaded version of fallout from D2D or steam, you will need to either install fomm into download manager sourceforgethe same directory as the fallout3.exe of the game you want to run it with, or manually edit the settings.xml file to add the node '<strValue name="FalloutDir">add the full path to your fallout directory here</strValue>'.

If fomm crashes on startup with a generic windows error then you likely have a problem with your .NET installation; fomm requires .NET 2.0 to run. Among the other third party gunk that the fallout 3 installer installs alongside the actual game is the original prepatched version of .NET 3.0, which under some circumstances can cause .NET 2 applications to break. In this case visiting windows update and installing the .NET 3 patch it offers you is sufficient to get fomm working.

Help on the actual usage of fomm is available from the wiki at http://fomm.wiki.sourceforge.net/, which is also available from inside fomm by clicking 'help' on the plugins list.

Uninstall
=========
No special uninstallation is required; just delete fomm. (Or run the uninstaller from the start menu, if you used the installer to install in the first place,) Before you do so you'll probably want to undo any changes that have been made with it, such as deactivating fomods or removing archive invalidation. All fomods you have installed will be saved in a 'mods' directory in the same folder as fomm.exe, which you may or may not want to deletdownload manager sourceforgee along with fomm.

Contact
=======
You can find me on the official Elder Scrolls forums or sourceforge as 'Timeslip'.

Credits
=======
Thanks to Bethesda for creating Fallout 3.
Thanks to LHammonds for the Readme Generator this file was based on.
Thanks to Claviticus for the code that the auto load order sorting functionality is based on.
Thanks to AliTheLord for an updated load order template
Thanks to Quarn for ArchiveInvalidation Invalidated, which fomm uses as its archive invalidation method.
Thanks to the long list of people who helped out with obmm development, which fomm is partially based on.

Licensing/Legal
===============
This mod is released under the GNU General Public License.
The GPL can be found here: http://www.gnu.org/licenses/gpl.txt

This mod uses the library SevenZipSharp, which is released under the GNU Lesser General Public License.
The LGPL can be found here: http://www.gnu.org/licenses/lgpl.txt

This mod uses the 7zip library, which is released under the GNU Lesser General Public License, version 2.1, with an unRAR restriction (see below).
The LGPL can be found here: http://www.gnu.org/licenses/lgpl.txt
7-Zip Copyright (C) 1999-2010 Igor Pavlov.

unRAR restriction
confusing!