recieved credit for music score, how do I gain access to that IMDb profile?

I assume that what you are wishing to do is to upload photos or add a resume?  If so, you will have to join IMDbPro in order to do that.  If all you wish to do is to add biographic information you can do that by editing the page.  Both these functions are available to you on the page for Lisa Hiland, via the Gold Edit Button and/or Gold Add Resume Button at the bottom of the page.