Organizational Assignment Default Date

Dear Gurus,

Any action if i do first come infotype 0000 action & Second is Organizational Assignment 0001, i Want Organizational Assignment ( IT0001 ) Start date is DEFAULT.

Mean IT 0001 Confirmation Action Start Date is 01.01.2009 to 31.12.9999

& IT 0002 ORG Start date is 01.01.2009 not Changelable to 31.12.9999

Please advised

Regards

MHPO