Your's is older than mine so you should have success. I haven't heard of anyone blowing up their cards by attempting the mod, but someone correct me if I'm wrong. I think it either works and unlocks the pipes or doesn't work and you have...
http://www.notebookforums.com/showthread.php?t=116884
Why create a new thread? You might also want to post more details (hard drive brand, DVD drive brand, chip type) and some pics.