I am using RS 1.3.42 and WP 3.1.3.

I have created a user as Page Author and restricted it to only one page. It worked well.
However, I also want this user to be able to see all the uploaded files (Media Library).
I've already checked two options in "Roles - Options - Media Library":

"Non-editors see other users' attached uploads"
"Non-editors see other users' unattached uploads" 

All this user can see in "Media Library" are only files that are not attached to any pages/posts.
Even the images that are already used in the page this user has access to are not visible in Media Library.

Can anybody help? Thx

Thanks for the reply, Kevin.

I have tried this. It did make all uploads visible in Media Library. 

However, when the user "add image" from TinyMCE in Post/Page Edit page. The popup's Media Library tab still displays only unattached files, instead of all uploads.

I am sorry if I didn't make it clear before.
What I actually want is to have media library shared by non-editors. This way, this author can add images uploaded by other users into his own page/post.

Is that possible?

dikko2000 said:

Although it says "editable" in this setting "SCOPER_ALL_UPLOADS_EDITABLE", I found that all uploads are read-only - you can neither edit them, nor insert them to any post.

Did I miss anything?

That constant name is somewhat misleading. All it does is disable Media Library filtering (reverting to upload_files requirement and resulting functionality). That's the only alternative to regular RS filtering that I'm offering at this point. You're right that the Media Library listing in the TinyMCE popup was still filtered, and I have included a fix for that in the updated Role Scoper development code (1.3.46-dev).