it is possible.
in: file > export project to.. (this opens the export footage panel) you should select the 'project layers' Tab
here you only have the PSD format so you don't need to select it
so if you want to save an animation you now only have to check te sequence box as a sequence of psd's
else check 'single image' and it will save your layered image as a single PSD.
Peter Wassink - 2D animator
• win 7 - 64bit - TVPaint 10.0.11 Pro (both 32 & 64 bit versions)
• win vista - 32 bit - TVPaint 10.0.06 Pro