Not a chance, 2 issues 1) nobody makes adaptors to go from 5x100 to 4x100, you can how get them for the other way round, 2) ET25 if you had say 20mm adaptors made this would end up at et5 so you will need major work on your arches.
http://www.rimstyle.com/products/detail/?category=wheel_tyre_packages;type=lenso_bsx_ss;manufacturer=lenso;model=574;id=LEBSXSS1675755BLA252512960
bbs rx2's are as fitted to the anniversay in 7x16 size (and also fitted to the mk4 but slightly narrower at 6.5) both in correct offset and 5x100 fitment
try these http://rimstyle.com/products/detail/?category=wheel_tyre_packages;type=bbs_rx_ii_forged_split-rim_bs;model=574;id=BBRX2BS1775755100353512960