There is guys! Not to fear! It's a real easy mod and I did it myself infact. Let me get you the link to the site. It allows you to make a 'Test Psu' where all you do is plug in the PSU and your fans and hit the switch on the PSU and BAM! you got power without the mobo. I needed it myself about 2 weeks ago.
http://www.casemodgod.com/mod_test_psu.htm
Enjoy! Took me about 5 mins to do. Real easy like.