Changing tracks by sliding on lockscreen?

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Ok here's my situation:
I am gonna add a phone holder under my car radio and connect via AUX/jack.
So I want a direct and easy access to change songs on my Sensation without unlocking the screen every time, I am using IC roms with Sense 3.5.
-Can I disable lockscreen just for music app? (screen off but no lockscreen)
-If no can I change tracks by sliding the music icon on the lockscreen?

The stock player has built in play/pause & skip buttons along with album art on the stock lockscreen so what's the problem?

While driving it's easier to just slide the album art like in the music app to change tracks, or you take risk of accident
I just wana have this function on the lockscreen instead of fucusing on small buttons