The subframe bushings can be replaced without dropping the subframe. This doesn't help if you're also doing the RTABS. A two jaw puller is used along with a modified harbor freight ($10) tie rod puller. This method also does not work if you're going to replace the factory bushing with a two piece after market variant (you need access above and below).
http://forums.bimmerforums.com/forum....php?t=1389953