HREIC_VP customization

Hi,

Can some one help me with steps to customize BSP Application HREIC_VP?

I got this requirement from my friend... I have knowledge about CRM IC WebClient, and i think this is similar to that.

If my assumption is right, where do i find the screen on SPRO where I can substitute the new controller? and also what are runtime and design time repositories for this?

Regards,

Nrisimhanadh