its not rocket science, just a few things to look out for
make sure you reassemble the top mounts EXCATLY the same as they were on the OE shocks (the H&R will have a large nut ontop of them, remove it and discard)
make sure you put the lower strut bolts back in the same way (threads pointing to the rear of the car)
set the drivers side front approx 7mm higher than all other corners
set the rears as low as they go
becarful when you remove the old struts that you don't damage the gairtors (or worse, pull the d/s out of the gearbox!)