[Live-demo] Getting rc2 running in VirtualBox on OS X 10.6

[Dane Springmeyer]

Hey All,

I just tried to downloading the http://download.osgeo.org/livedvd/3.0-rc2/ 
  and get it running in VirtualBox on Mac OS X 10.6

I followed the http://wiki.osgeo.org/wiki/Live_GIS_Disc_Quick_Start  
instructions

and did:

wget -c http://download.osgeo.org/livedvd/3.0-rc2/arramagong-3.0-rc2.7z.0
wget -c http://download.osgeo.org/livedvd/3.0-rc2/arramagong-3.0-rc2.7z.1
wget -c http://download.osgeo.org/livedvd/3.0-rc2/arramagong-3.0-rc2.7z.2

cat arramagong-3.0-rc2.7z.0 arramagong-3.0-rc2.7z.1 arramagong-3.0- 
rc2.7z.2 > arram.iso

Then tried to load that iso in VirtualBox (the latest - 3.1.4 r57640),  
but I get this error:

'error VERR_VD_RAW_INVALID_HEADER opening image file'

Anyone know what might be going wrong? I've downloaded 3 times and the  
files look like they are arriving fine:

$ ls -l
total 15787008
-rw-r--r--  1 dane  staff  4041471477 Feb 26 19:47 arram.iso
-rw-r--r--  1 dane  staff  1572864000 Feb 21 05:23 arramagong-3.0- 
rc2.7z.0
-rw-r--r--  1 dane  staff  1572864000 Feb 21 05:24 arramagong-3.0- 
rc2.7z.1
-rw-r--r--  1 dane  staff   895743477 Feb 21 05:24 arramagong-3.0- 
rc2.7z.2

Thanks for any ideas.

Dane