should be alright to dive it like that just take it easy. I drove mine to my mates house to borrow his windy gun with 3 corners lowered and passenger front up in the air, no big deal just dont drive it like you're doing a timed rally stage

as above if you dont have the right size key in your set its probably a 7mm, I found one of my old shocks was 7 and the other was 6mm which was fun. If you pop into halfords they doo a deep reach 7mm allen key with a big comfy grip handle on it, its for doign brake pad swaps on certain models. Makes this job a doddle, just need a lamda/diesel injector or sparkplug socket with spanner flats on so you can poke the allen key down t' middle