NWDI Installation Update

Hello experts,

I had a Netweaver 7.5 installed with product instance only Adobe Document Services enabled as you can see in the screenshot below,

However, we found that we need to install NWDI as well.  So is it OK that I re-do the product instance reinstall with Adobe Document Services and NWDI?  Will this impact the current Netweaver 7.5 installed?

Thanks

Johnny