Numerous threads in the Suspension section re: rear trailing arm bushing replacement. Some members here even have the tool for rent.
http://www.zhpmafia.com/forums/searc...archid=2530133
The VANOS oil pipe (hose) is ~$40-50 from the dealer (i didn't want to go with an off-brand here), and you should purchase 4 new washers. Not hard to do if you have smaller hands - just takes a bit of time.