Badi and User Exit for AS01

Hi Gurus,

I need your assistance for the below requirement.

In AS01 ( Create Asset ), while creating ASSET the Equipment should be created. This syncronization is already done in the customization.

1.The requirement is the Equipment Field in the ALLOCATION Tab should automatically get the Asset Number Value once we click the ALLOCATION Tab.

2.And also the Equipment should be created only if the Evaluation Group 2 is 'Y'.

i checked all the Exits and BADI's available. But my requirement is not met. please help me in this.