Powershell registering dll

Hi,
I am  looking for a solution on how to register dlls  using Windows powershell.I want to know the option in PowerShell that performs  similar action as RegAsm command. In my project presntly the assemblies are registered  by runing batch files (.bat) and the   RegAsm command is used to achieve this.

 Now as per the new requirement , I have to achieve this using the Windows Powershell. I dont have much idea on powershell.It wil be great help if you could suggest me on  how I can register my custom assembiles by creating commandlets (instead of bat files)

Thanks
Prajeesh