Sure just amke sure the write filer is off and your admin
If you can get Powershell 3.0 installed then let me know thats a complete mystery to me. You may need to update your enviroment temp directory to a USB or just a temp folder on C as you need over 130mb for the install to work.
Yes it is possible. go to www.wyse.com/kb and in the knowledge base, search for "10687". This knowledge base will provide you with the guidelines on installing the files.
Visit our Dell Wyse Thin Client Knowledge Base and Manuals web site at www.wyse.com/KB
Visit our Dell Wyse PocketCloud Knowledge Base and Manuals web site at http://pocketcloudsupport.wyse.com/forums