[Styles]

List of regions:
eastcoast - sv_region 0
westcoast - sv_region 1
south america - sv_region 2
europe - sv_region 3
asia - sv_region 4
australia - sv_region 5
middle east - sv_region 6
africa - sv_region 7
world - sv_region 255

Stop asking people, a quick google search figured it out.

(Source) http://www.tomhackers.com/HLDS-Update-tool.html