Bumping an old thread, but I am still unable to change my signature the way I'd like. I added a few items to my 300ZX portion, and it would have still kept me at 4 lines or less, but it is still rejecting me. The only way I found around it was to delete the blank space between my cars - which I am unhappy with.
Was there ever any resolution to this, or was it just sort of forgotten about?
I also like Lynch's idea, above.