I take the forks off to make life easier, some guys leave them on the lower clamp....
I put a trash bag underneath to catch the balls, clean them with gas or ?? and put them back in with some good grease. The grease holds the lower ones on, then hold the lower up tight while you drop in the uppers.
I do 99% of my work alone, you just have to think and be very creative sometimes 
It's a great idea to update like MM suggested but some guys have a bit of trouble removing the old lower inner race, just be aware that it does take a bit of work to get those kits in there correctly
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country