Hi,
yes to do the front ARB you have to lower the subframe, also undo the stearing rack after first securing it to the springs with rope so it doesn`t drop with the sub frame. You also need to remove the dog mount (think thats what its called.
be carefull with the passenger side ARB bush bracket as this also is attached to 2 pipes (air con I think) so there is a bolt to take out (that can be tricky) before you remove the passenger side clip.
I did mine on a friends ramps so was easier really Id advise to get the front of the car in the air supported and both wheels off.
Any other info just give me a shout ... Jared