1: While I try to help with vBa integration, I cannot say that I am always successful because I don't use vBa and am not familiar with its code. If I know the answer, then I will tell you the answer. If I don't know the answer, then I will say that I don't know the answer. If you seek custom coding as part of support, please note that coding custom modifications is really outside the realm of support, so I won't provide custom modifications. Sorry.
2: PhotoPlog Pro allows you to set the image links to be dynamic whereby the path to the image is hidden and permissions are checked before displaying the image. However, this uses extra queries and system resources and is not recommended for that reason. If you want to stop hotlinking with an htaccess file, there is a generator
here.
3: No installation service is offered. The installation itself is pretty straightforward. For new installations you need to set your server path and table prefix, FTP the files, set 777 permissions on a directory, import the XML product file via the ACP, set some ACP settings and permissions, create categories, and start uploading files.