Special Regex

Hello,

I Need help with a complicated regex.

What I have is a share on a Server like:

[string]Servername\BO001\02_Public\01_Transfer ...

What I want to create is a Security Group in AD that should look like:

Servername-BO001-02-01-RO
Servername-BO001-02-01-RW

I dont Need the creation of Security Groups in Active Directory but the regex to transform the string.

thanks for any help.

Thomas