To install GO!Script on your pc,you must first have the .NET Framework 2.0 installed.If you don't , get it from here(about 21 mb).In addition to these below you should download snippets here to extract the maximum out of GO!Script .

VERSION MIRROR SIZE LINK
3.0.0.6(compressed) Sourceforge 250k Download
3.0.0.3 Download.com 651k
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3.0(SC) Sourceforge 208k Download