I uploaded the userbars to the ./images/ directory of the MyBB installation. That's a problem when you use hosts like CreateMyBB, since they don't give you access to the server files. And even with web hosts with cPanel, you don't have access to the Apache files. That's why either a VPS or a dedicated server is best. Pretty much anything that gives you root access for Apache and for installing things like ASP.NET and MySQL.