Change DB from MSSQL to MySQL, please help

[credenscel]

Hi there,
When i first started the site i had no idea how websites worked so i actually hired someone to setup VB for me. Years later, once i learned how websites actually work, i started managing the site myself and doing the updates.

I realized the original developer used MSSQL DB which is pretty much useless to me since the site is pretty small and MySQL DB is more than sufficient.

So can someone please let me know how i can switch my VB from MSSQL to MySQL without losing data (user accounts and forum posts)?

Any input you can give will be appreciated!
Thanks!