Custom Allocation Temp Tables

Good Afternoon,

We are using custom fields in some of our journal entries and will be implementing the allocation processes within PeopleSoft 9.1.  We would like to clone the allocation temp tables and add these custom fields to be used in the allocation step configuration.  Has anyone else implemented the allocation process using custom fields?  Have you reported any major issues with using custom fields?  When using custom fields, did this impact the performance of running the allocation processes?

Thanks,

Linda