If you want to make vector artwork that works with the Pulado Flash Game Engine you will probably need a copy of Adobe Flash. Some other vector based programs like Xara can also export to the SWF format. Or you can just use PNG files with alpha transparency but they do not scale as well as vector artwork.

You can download a trial version of Flash 8 below (the full version costs $50) or you can get the full version for free using their TrialPay option.
http://marketsmaster.org/flash_professional_8/

Or you can download the latest 30 day trial version of Flash Pro CS5.5 from:
http://www.adobe.com/cfusion/tdrc/index.cfm?product=flash

Remember with the Flash Pro CS5.5 version to compile your artwork or screens for AS2 and Flash Player 8.