hunter4

Maybe you should combine the plugins

User Permissions

https://urbangiraffe.com/plugins/user-permissions/

and use drain hole as download manager

https://urbangiraffe.com/plugins/drain-hole/

Maybe you should use wp23_related_post

it`s compatible with wordpress 2.5.x

WordPress tabs and slides has been fixed, is compatible for 2.5.1

Abdul Ibad..