How to keep Renewal condition to renew contracts expiring in less than or equal to 90 days always

Hi,

We have a requirement to renew contracts expiring in next 90 days always.Means every day when i ran this program it should pick all contracts whose end date is less than or equal to 90.Existing functionality of Renewal program is always checking last run date+90 and sysdate+90 condition but our requirement is that it should always check less than or equal to 90 days condition.we tried adding custom function but need some inputs on how to configure this.

Also if one of the line of active contract is on hold it should get the line renewed in hold status.Is there a way to get this feasible.