M
Malkom
Guest
http://www.kungfoomanchu.com/guides/andy-klise-megaminx.pdf has some good algs tooR2 U2 R2' U R2 U2 R2'
J perm is decent enough for the other case.
Change U(2) to U(2)' if the case is the CW cycle.
I use this site to find most of my Megaminx LL algs, in case anyone wants to learn PLL.
http://hem.bredband.net/_zlv_/rubiks/megaminx-new/index.html