WPMU plug-ins on single installation

Hi, I think your plug-ins are awesome---it's the reason I joined. However, in building the network, I realized that I have no power to control existing sub-sites. Therefore, if I want to make changes to all my sites at one time, it's impossible unless I use YD Network-Wide Options, which I found to be very unstable. That said, I am now moving back to a single installation---my question, is it possible to use some of these plug-ins without access to the Network Admin? For example, pro-sites, or marketpress, or New Blog Templates...I see under the plug-in menu on my dashboard there is an option to EDIT the plug-in --- can changes be made there to work on a single install? thx