Answer

Wscript.StdOut.WriteLine("Setting up variables.")
server = "DS Computer Name"
domain = "Your Domain"
username = "username"
password = "password"
jobName = "TestJob"
computerName = "WinXPClient01"
myAppName = "myAppName"
appDescription = "myAppDescription"
appLocation = "myAppLocation"

Wscript.StdOut.WriteLine("Creating Altiris.ASDK.DS.JobManagement object.")
Set jobManagement = CreateObject("Altiris.ASDK.DS.JobManagement")
Wscript.StdOut.WriteLine("Creating Altiris.ASDK.DS.ScheduleManagement object.")
Set scheduleManagement = CreateObject("Altiris.ASDK.DS.ScheduleManagement")

Wscript.StdOut.WriteLine("Attempting .Net Authentication for jobManagement")
jobManagement.TargetServer = server
jobManagement.UserName = username
jobManagement.Password = password
jobManagement.DomainName = domain
jobManagement.Authenticate()

Wscript.StdOut.WriteLine("Attempting .Net Authentication for scheduleManagement.")
scheduleManagement.TargetServer = server
scheduleManagement.UserName = username
scheduleManagement.Password = password
scheduleManagement.DomainName = domain
scheduleManagement.Authenticate()

'-----------------------------------------
' DSAuthenticate
' This is the authentication passed to
' the DS DB Management Service
'-----------------------------------------
Wscript.StdOut.WriteLine("Attempting DSAuthentication for jobManagement.")
call jobManagement.DSAuthenticate(username, password, domain) 'username,password,domain
Wscript.StdOut.WriteLine("Attempting DSAuthentication for scheduleManagement.")
call scheduleManagement.DSAuthenticate(username, password, domain) 'username,password,domain

'-----------------------------------------
' GetComputerInfo computerID
'-----------------------------------------
Wscript.StdOut.WriteLine("Calling jobManagement.GetJobIDs")
jobList = jobManagement.GetJobIDs(jobName)

tempJobID = jobList(0) ' use the only element that comes back from the function.  This will error if there is
Wscript.StdOut.WriteLine("JobIDFound for " & jobName & ":  " & tempJobID)

myAppID = scheduleManagement.RegisterExternalApp(myAppName, appDescription, appLocation, false)
scheduleID = scheduleManagement.CreateJobScheduleByName(computerName, tempJobID, false, myAppName, _
"<ScheduleAttributes xmlns=""http://tempuri.org/ScheduleAttributes.xsd"">" & vbcrlf & _
"<Schedule_Attribute_Table>" & vbcrlf & _
"  <start_time>" & Now() & "</start_time>" & vbcrlf & _
"  <defer_time>0</defer_time>" & vbcrlf & _
"  <recurrence_value>1</recurrence_value>"  & vbcrlf & _
"   <recurrence_type>Hours</recurrence_type>"  & vbcrlf & _
"   <batch_size>0</batch_size>"  & vbcrlf & _
"   <batch_interval>0</batch_interval>"  & vbcrlf & _
" </Schedule_Attribute_Table>"  & vbcrlf & _
"</ScheduleAttributes>")