To rename projects in PS Touch simply tap onto the file name.
To move projects in the Gallery tap the first button in the top bar and choose the menu entry "Move".
Adding to what joerg said, the same icon is used to create a folder. TIP: When you begin a PS Touch project, make sure to start in this folder. (e.g., Tapping the new project icon out in the file browser while in a specific folder.) That way, when you save, it'll automatically be saved in this folder without you having to move it.
adding to this does any one know how to keep the file names identical when using a picture transfering it, moving it . saving it to gallery ?? i mean photoshop has a weird thing where it decides to change file names by itself ?! i am really sick of changing names over n over
You mean keeping the PS Touch project's file name the same as the exported output? It does--kind of--via the metadata. The actual exported file name has more to do with the mobile operating system, I think.