Call data-specific stored procedure from Oracle procedure

I have a situation where I have an Oracle procedure that is being called from at least 3 or 4 different places. I need to be able to be able to call custom-code depending on some data. The custom-code is customer-specific - so, customer A might want to do A-B-C where customer B might want to do 6-7-8 and customer C doesn't need to do anything extra. When customers D...Z come along, I don't want to have to modify my existing procedure.

I'd like to be able to enter the customer-specific procedure into a table. In this existing procedure, check that database table if a custom-code procedure exists and if so, execute it. Each of the customer-code procedures would have the same parameters.

For instance:

1. My application (3+ places) calls this "delete" procedure
2. In this delete procedure, look up the name of a child-procedure to call (if one exists at all)
3. If one exists, execute that delete procedure (passing the parameters in)

I know I can do this with building a string that contains the call to the stored procedure. But, I'd like to know if Oracle 10g has anything built in for doing this kind of thing?

The final solution that we went with was to store the name of a procedure in a database table. We then build the SQL call and use an EXECUTE statement.