you didn't state what car is it.
anyway, if it's a e65, the only one i know how.
you have to support the engine from the top, take the 2 bolt out of the engine mount from the top.
then drop down the whole subframe, you don't have to take it out, just take out all 6 bolts holding it, and then let it hang with the suspension arms still intact.
once you done that. u can remove the lower oil pan, u should see bolts inside. after this it's pretty straight forward.
lower the subframe is to get u enough room to feed the oil pan out.