Yeah, that would work fine. I actually just added that as a new size/aspect ratio to our database. As soon as your system auto-updates to 220.127.116.11 it will have that new database entry. Then, you'll be able to go into the Pluto Admin website, choose Advanced, Devices, locate the PDA, and change the data parameter "PK_Size" to 4 (which is 320x240).
Of course, this is just a really bad hack to get you to see it. All that it will do is scale the screen down to 320x240. The buttons will be so small you'll hardly be able to read them.
The real solution is to create what, in Designer, is called a new "Criteria" specifically for the PDA. This is what we did in v1, and this is what we do now to distinguish the tablet and the phone. With the PDA Criteria, we can re-arrange the screen, and place less buttons on there. So, the DVD remote on the tablet may have several advanced buttons and a more broad layout with big cover art, the PDA may have only the basic buttons and put the advanced options and cover art on a separate tab. That's what we will do eventually, but for now, I just added a new scaling value in the Size table.
The 18.104.22.168 upgrade should be up next Thursday or Friday. If you change the size to '4' before the upgrade posts, then OrbiterGen won't generate anything for the pda since it won't know how to handle that size.