Virtual PC is one way.

Vmware workstation allows you to install an operating system on a " Mini " computer " but its only free for a month.

You download vmware workstation 8 and install Windows on it like you would a new computer, disc in, install ect just like a fresh installation of windows.

Only problems are if your computer is old or outdated the chances of you playing without lagging are slim.

apart from that, i see no other solution i'm hopeless with Java lol.

I googled this for you. :|

From;

https://help.ubuntu.com/community/Java

Install Oracle java. (formerly Sun Java)

Also, make sure java AND browser 

caches

 are clean and javascript is enabled in browser.

http://www.flyordie.com/games/help/support/clearcache.html

http://www.flyordie.com/games/help/support/contents.html

Installing a virtual machine to run another virtual machine is just too weird for comment. ;)

Keep your opinions to yourself m8.