Make sure it's at room temp. The colder the med is the more it stings. Also, I always found it less "stingy" if I took a shower or bath first. That could have been all in my mind, but it seemed like the tissue hurt less during the shot.
I think it might hurt more to have it all in one syringe, but I feel for you! I cannot imagine having to give my 10-year-old those injections, knowing how they feel. But, the worst of the sting is during the injection.
--40 year old female, dx as UC in '04 (1st symptoms in '03), switched to Crohn's in '05, 1 fistula, crohn's colitis, limited to large intestine
--rejected (reaction/didn't work): Asacol, AZA, 6-MP, MTX, Remicade, Humira, prednisone
--stuck on methylprednisolone, tried Prochymal in Phase III study (can't wait til it's approved!)
--started Tysabri 3/21/08
--single mom to 10-year-old girl