I did this to my car - it's actually easy (I did not cut bushings or change out the bolts... just lowered on stock bolts). Do you have a jack and stands? If so, it may take about 20 minutes to lower the back and slightly longer to lower the front (jacking time included).
For the rear's once it's jacked up and on stands, you do not need to take the wheels off. Just two wrenches and a few turns and your done.
For the front - you need to take the wheels off or it's somewhat difficult to get to the bolt. Also, you may need some penetrating lube for the bolt to get it to loosen a bit as it's a hard turn. Then it's a few minutes on each side and your done.
Hmm.. I may be able to meet you sometime. My schedule this weekend and next looks not good, though, as I am working Saturday and leaving on vacation on Thursday next week.
If no one else chimes in, I'll get with you when I get back from vacation and we can figure it out.
It's actually easy - Hard part is just getting past the "I'm messing with my car" part.