I've done it using a front stand that goes under the yokes (triple clamps) so it holds the bike rather than the forks, allowing you to adjust.
When I've stripped bikes before and removed forks I have used ratchet straps on the frame and rafters in the garage to again suspend the bike and take the weight off the forks. Not ideal, but it works!
I'd rather die peacefully in my sleep like my Grandfather, than screaming in terror like his passengers.- Jim Harkins