Here are some instructions:
http://www.learnastronomyhq.com/articles/how-would-our-sun-look-from-alpha-centauri.html
The Sun would appear to be near the constellation Cassiopeia, which itself would look pretty much the same from only 4 and a bit ly away. Sirius would seem to be fairly close to Betelgeuse.
ETA: You can also use Celestia to work out such things:
http://celestiaproject.net/
http://www.learnastronomyhq.com/articles/how-would-our-sun-look-from-alpha-centauri.html
The Sun would appear to be near the constellation Cassiopeia, which itself would look pretty much the same from only 4 and a bit ly away. Sirius would seem to be fairly close to Betelgeuse.
ETA: You can also use Celestia to work out such things:
http://celestiaproject.net/
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