How to split a string type field value in sharepoint list using SPD workflow

Hi,

  How to split a string type field value in sharepoint list using SPD workflow ?

We hav a column CLIENT NAME in a custom list which is a single line of text type field. User are supposed to enter multiple client name separated with a comma(,). Our objective is to split all the client names one by one. we know it can be done through code(Event Handler). But is there any SPD workflow action to get this done ?

We are using MOSS 2007 & SPD 2007. Any help would be appreciated.

Brushaketu