Create report that lists every user with permissions for each folder

I would like to have a report that will list each user with it's roles for every folder.

We have a very large RS database with a lot of folders, we need some better way to keep track of permissions.

I created a report that utilizes "GetPolicies" from http://localhost/reportserver/ReportService2005.asmx

but I have to feed a folder name to get list of users.

I can also (by using subreport) list all folders with users.

However, I am not able to produce a report where I have it broken by user.

any idea?