Just say i have a site up and have it linking to different scripts in different folders. EG: http://mydomain.com then having a script on my site install here http://mydomain.com/folder/ Would Pagerank appear also for the subdomain or not. ( http://folder.mydomain.com ) or only one? Please let me know.
It would appear for only 1... The subdomain is considered a completely "different" website by Google for PR purposes..
yeah of course the page rank would appear, however the folder.youdomain.com is considered as a completly new domain and site as rationale said, so if you build links to yourdomain.com to gain page rank, folder.youdomain.com would not really benefit from it.