Stored Procedure String Manipulation

I am somewhat new to the world of programming with SQL Server and was wondering if this could be done. Well I know it can be done but was wondering how it might be done.

I have a DTS package created to import a table from and AS400 server. What I need to do is take one field and parse that field into 5 different values for 5 new fields.

Here is what I know needs to be done but not sure how to put into the procedure.

CREATE proc ChangeHIS

as
--Declare Variables
Declare @LastName varchar,
@FirstName varchar,
@MI varchar,
@ID varchar,
@Dept varchar,
@intCount int,
@UserName varchar,
@strTemp varchar

--Create Temporary Table

CREATE TABLE [EmployeeAudit].[dbo].[tmpTable] (
[UPUPRF] varchar (10),
[UPTEXT] varchar (50)
)

select [UPUPRF], [UPTEXT] from tblHIS into tmpTable

GO

And something dealing with the below code as well.

@tmpString = RTRIM(LTRIM(@tmpString))

If charindex(@tmpString, ",") > 0
--'Manuel, Michael J - 78672 - SR MIS SUPPORT SPEC'
@LastName = Left(@tmpString, charindex(@tmpString, ","))
@tmpString = RTRIM(LTRIM(Right(@tmpString, Len(@tmpString) - charindex(@tmpString, ",") + 1)))
--'Michael J - 78672 - SR MIS SUPPORT SPEC'
@FirstName = Left(@tmpString, charindex(@tmpString, " "))
@tmpString = RTRIM(LTRIM(Right(@tmpString, Len(@tmpString) - charindex(@tmpString, " ") + 1)))
If charindex(@tmpString, "-") > 1
--'J - 78672 - SR MIS SUPPORT SPEC'
@MI = Left(@tmpString, 1)
@tmpSting = RTRIM(LTRIM(Right(@tmpString, Len(@tmpString) - 2)
End
--'- 78672 - SR MIS SUPPORT SPEC'
@ID = Left(@tmpString, charindex(@tmpString, " - "))
@tmpString = RTRIM(LTRIM(Right(@tmpString, Len(@tmpString) - charindex(@tmpString, " - ") + 3)))
--'SR MIS SUPPORT SPEC'
@Dept = @tmpString
End

Hope someone can point me in the right direction