Scripting

I'm using Wise Script version 9. With that said I am trying to append three DNS suffixes to the existing multi string value "SearchList". It's easy enough to just populate the key with the suffixes but I need to take it a step further. I need to take into consideration that some users may already have DNS suffixes defined in this key and I don't want to break that in any way. How can I add my three suffixes to the beginning of the "value data?" I'm thinking I will need to use the "Parse String" action but really don't have any experience with it.

Also I believe that SearchList is limited to 255 characters. What happens if by adding my suffixes I exceed the limit? I'm not as concerned with this at the moment as I am in trying to figure out how to append the suffixes.

Any help would be greatly appreciated.