In order to save space if you have a small internal hard drive you may want to
consider installing software on a external hard drive.  This does not always
work, you will have to experiment.  The problems you may run into are that
the software needs to be administrator in order to run. The software may have dll

problems, or it could lock up, or freeze.  Not all software needs a strict regiment of
required rules when it is installed, and they run fine on the external drive.

The following APP was downloaded using Firefox, and installed on a Toshiba

external hard drive that was located on the F: drive.  Your location could be

named different.  Named by the manufacturer for the hard drive and

depending on if you have multiple drives.  Follow along as you learn with

this picture tutorial on how to install a software and run the software on

the External hard drive.  It is not as hard as you may think.

Of note:  PortableApps is a software to help you to install and run software on a portable drive.

How to Geek has a great article for setting this up.  It is located here:

http://www.howtogeek.com/howto/the-geek-blog/install-and-run-applications-from-your-ipod-flash-drive-or-mp3-player/ I advise you to start there.  Then come back here in case you need further information.   Yes I know it sounds as though I am downgrading the importance of my own article.  But really I am not if you think about it, both articles have a walk through, and if one doesn't help you, the other one will.

PortableApps helps you to run apps on a external or portable when everything else you have tried has failed.

Another program called CodySafe does the same thing as PortableApps.   How to Geek has a tutor for setting this one up as well located here:

http://blogs.howtogeek.com/mysticgeek/2009/05/04/codysafe-is-an-alternative-to-portableapps/

On to my tutorial...

In picture 1 I am choosing my location to download the tiptopsetup App file.

Picture 2. In Firefox after the download is complete, I go to the downloads

manager, and right click the download and select the "open containing folder".

Picture 3.  This image is just showing you the highlighted file after you

select the "open containing folder in firefox.