Sorry for the extremely long delay. My son came into the world and everything else stopped. I just got back to this and got it working with Umbraco version 4.5.2 with GSP version 2.4.3.
Here are the steps
1. Install GalleryServerPro, so the database will be created for you.
2. Install Umbraco with Creative Website Starter Kit, make sure you have everything configured properly and working!
3. Copy all the DLL from GalleryServerPro\bin to Umbraco\bin.
4. Copy App_GlobalResources folder from GSP to Umbraco root. And copy the gs folder from GSP to Umbraco\usercontrols\GalleryServerPro.
5. Merge the GSP\web.config with Umbraco\web.config. I used the 4.0 version on both. See attached file for example.
6. Create a macro in Umbraco, call it GalleryServerPro. Set the (Assembly) name to GalleryServerPro.Web and the (Type) name to GalleryServerPro.Web.Gallery.
7. Modify the Master template, adding runat="server" to the <head> tag.
8. Modify the Galleries template, replacing CWS_ListGalleries with GalleryServerPro. This is the macro you created in step 6.
9. In Umbraco Members module, add a Member Type called System Administrator.
10. Then add a new member, adding System Administrator to the Member Group. This is the account you will log into GSP with, not the Umbraco User account.
11. Set the MembershipProviderName in gs_AppSetting of the GSP database to UmbracoMembershipProvider.
12. Set the RoleProviderName in gs_AppSetting of the GSP database to UmbracoRoleProvider.
13. Set the ProductKey in gs_AppSetting of the GSP database to what ever your key.
14. Set the MediaObjectPath in gs_GallerySetting of the GSP database to where your gs folder is, i.e., \usercontrols\GalleryServerPro\gs\mediaobjects. Remember there are two of these, one is the template and one is the actual value!
You should be able to go to your Gallery on Umbraco and see the sample album. You can login with the member account created in step 10 and manage your albums.
Please, remember to donate to these projects. They put their heart and soul into these projects and made it possible for you and I.