Here we go again, as far as I know this hasn't been done on the 3d before. ( I could be wrong, don't know, but I haven't seen it) Let's get to it, actually a very easy mod.
Assuming you have experience with m10 tools and apktool (apk manager)
Open rosie.apk in m10 tools, in the list of m10 files find Rosie_Screen.m10 and decompile it. Once decompiled open all "+" tabs on the left side of the screen until you get to item. Click on item and on the right side of the screen under Known Properties find Cell padding Y= 60.000000 and click on it. In the edit box at the top of the screen change it to 80.000000. Now find number of cells on Y= 4.000000 click on it and in the edit box at the top of the screen change it to 5.000000.
Back out and recompile.
Not done yet. Now using apktool or apk manager, decompile rosie.apk.
Once decompiled open res folder then values folder. Using notepad++ open integers. Now find "workspace_screen_cl_long_axis_cells">4</ integer> click on the 4 and change it to 5 and save the file. Now recompile rosie.apk resign and zipalign. Now you have a 4x5 rosie workspace thats all rendered correctly, no other re sizing needed. I hope you enjoy this mod, it's one I've actually been waiting for. ( Got tired of waiting LOL) Play around with it if you're comfortable, I have also been able to make it 5x5, 5x4 and even 4x6. The 4x6 makes some widgets overlap though.