This install is on a Ubuntu 11 system.
I have it Neopaint 4.7a installed into a Windows XP bottle.
The bottle is empty except for Neopaint so there are no extra dependency installs needed.
The program installed directly from the .exe file.
I have found only one problem with the install under Crossover.
When using the "open" function under the "file" tab the navigation tree doesn't include any external media locations. I can navigate to the the Ubuntu install but can't load images from external hard drives or flash drives.
It's still possible to drag image files from an open folder on the flash drive and drop it directly onto Neopaint. Neopaint will then load the file. You just can't navigate to the file through the menu.