Importing IBM AIX5.2 rootvg from physicaldrive to> linuxbox

hi@ll!

we have some problems with AIX5.2 rootvg. maybe someone can help us.
for analysing an incident we have to attach some physicaldrives from a 
IBM RS/6000 Server. We have access to the rawdevice but on the linux-box
we haven't any access to the volume group rootvg or even to the logical-volumes.
did anyone have done something similiar? How it could be possible to start a lvm 
an import such rootvg from the physicaldrive to start a grave-robber?
help would be apreciated!

thx!
momurder