How to Bulk load multiple users into aspnetdb

Hi there,
I'm using VWD 2010 asp.net 4.0 and SQL Server 2008 Express
I created a website that uses security with aspnetdb configuration
now I have hundred users that need to access this website
And I don't want manually insert them one by one
Is there any way (T SQL Stored Proc or ASP.NET VB code) to automated this bulk insert?
Thanks,
Oded Dror 
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