service - Replace metadata page to Aspx page in Servicestack? -

i want replace metadata page of servicestack custom design page. have tried customise metadata page want replace our aspx page. in aspx page want add/remove our plugins of servicestack.

we using servicestack version 3.9 development.

1. how can replace /metadata page other page?
2. if replacement of page possible how can access metadatafeature handler? means, how can display operations in page?