Not really, especially with one like GWX, which installs itself. The others can use JSGME.
The best thing is to use MultiSH3. You can get it by itself
http://www.subsim.com/radioroom/down...o=file&id=1869 or as a bundle with SH3 Front-End.
http://www.subsim.com/radioroom/down...o=file&id=4441