Reusable Package for multiple ETL jobs

I have around 1000 tables to be ETLed using SSIS.

For each ETL following are the standard steps

1. Purge Staging Table 1 ( SQL task)

2. Extract, Transform the data and load Staging table 1( Data Flow Task)

     a) ODBC source

     b) Dervied columns

     c) OLE DB destination

3. Purge Staging Table 2( SQL task)

4. Extract from Stgng 1 and Load Staging 2( Data Flow Task)

     a) OLEDB source

     b) OLEDB target

All these 4 steps are grouped using Group.

Now my question is , Is there a way I can export it to a xml or any other flat file format.

All I have to do it replace table names and few field names. And Import it back to SSIS .when I open the package it should have the mapping and modified code in place.

Please let me know if there is anyway of doing this.