This package did not come with a document saying how to install it. Could anyone explain to me what to do? Thanks.

unpack the zip file.... then simpy upload to your website via ftp program like filezilla or CuteFTP..

once connected to your server through your ftp program of choice, go www(or html) find modules double click that then upload your roster folder in the modules folder . (might have to click the folder a few times before uploading to open it, get to the root folder which should be called Roster..

all in all when done the path should look something like this if your are putting it into phpNuke

/www/modules/Roster/ the Roster folder will be created when you uplaod that root folder.