Hi hiestandc,
without using the concept of Policys and templates, you need to do:
Create 1 Mediapool (Overwrite Protection Time 1 Week, Append Time 4 Days
Create 1 Job with Options set to Full Backup and Overwrite.
Create a 2nd Job with Options set to Differential and Append.
Job 1 is scheduled for your weekend
Job 2 is scheduled for your workdays.
That is the whole magic.
Note to do a restore you need the last full and the last differntial.
Its not like the incremental Szanario where you need all the incremental since the Full Backup.
Kind regards
OUTLOOK ANYWHERE