the visu button in the audio player is on the top right of the screen, its the icon that looks like a Spectrum analyzer, and on other screens where need be its where the date is.
Clickin the TIME has a different function.
It runs MMB.exe whos only purpose is to invoke MouseWheelInput
MMB.exe is located in Road Runner\LSTOOLS\SCRIPTS\MMB.exe
So make sure you do have LSTOOLS located in the root of RR install. Or you will have issues as with the current release of RR, if RR cant find an exe you will loose touchscreen support.
As for running VISU fullscreen and not being able to exit back to RR, you should be able to exit fullscreen by double clicking the visualization.
and as for speedo's, i havent checked out the speedo in ME2.0 (but ill take a look). But there is a NEW speedo that i will be releaseing thats far more practicle than the current one. Although... it currently isnt ment to be used with LSX

(at least not in areas other than the GPS screen) its for a new skin im working on, but i think people will find it a lot better.