Hello chaza,
And welcome to the Polish forums.
Try this program ivona.com, just type the word you need in and she will pronounce it for you and generally the emphasis is on the second last syllable.
You also might want to check out
Collection of learning resources for learning the Polish language. If you use the search box at the top right hand corner of this page, you can find many threads about learning Polish.
Keep up the good work.