overwrite protection on weekly full Backup jobs

Hi

My name is Assaf from Israel and I am the Sys Admin in my company .

We run the Backup exec 2012 with HP backup robot with 24 tape's.

I have problem with configure a backup job for my needs.

I have 1 full job that run ones a week on every Thursday.

I need to found the way to create this job with the fallowing configuration.

Every first, second, third Thursday a full backup job with wraith protection for 4 days.

On the last Thursday of the month I like to run the some job but in this time to tack the tape out of the loop and never overwrite on it.

Is this configuration can be configured on my software / hardware

Thanks in advance

Assaf