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Download Virtual box (install): http://www.virtualbox.org/wiki/Downloads

Download Ubuntu linux (save to desktop): http://www.ubuntu.com/
getubuntu/download

Now run Virtual box.
Click New (follow wizard)
* Set Base Memory Size to 1 GB (depending on the Memory of your computer)
* Click New, Next, Next
** Set Image size to 4 GB, Next, Finish
* Next, Finish
Click Settings
* Choose CD/DVD-ROM
** Click Mount CD
** Click ISO Image file
** Click select file
** Find ubuntu on the Desktop
Click start (wait for Ubuntu to start up)

On the Ubuntu desktop click Install
* Choose language, Forward
* Choose location
* Choose keyboard
* Prepare disk space (Guided - use entire disk = the disk Image that you allocated above)
* Name and password
* Install
* Restart

Install Java
* Choose Applications/Add-Remove...
** Choose All available apps
** Search: java
** tjeck Sun java 5.0 runtime
** Apply changes, Apply

Get SARSE

Open FireFox

Download sarse: http://sarse.ku.dk/

Extract to desktop

Open terminal (Applications/Utilities/Terminal)

On the command line write:

cd Desktop/sarse-1.37/linux/bin

./SARSE (the program will start)