Authentication on a Home Server

[rsnfunky]

Hi All, I have made a home NAS server out of an old PC.

Server: Gentoo Machine having Samba and NFS

Clients:
1) Windows PCs and Laptops
2) Gentoo PC
3) TV
4) Android Mobiles

Issue:
1) When implemneting NAS the clients can only access data if logged in from root account. I read that the uid on clinet machine and server needs to be the same. How does one do that. (if one needs to implement OpenLdap its an overkill - Any easy way to do it)

2) On windows machine only 1 user can access the sambe shares. How to create more users / share different directoroes on different user names

3) How to share files to the mobiles on home wifi?