Hey, Ripster!
I remember 2 years ago,when I started on hard boots. I had a brand new pair of Head Stratos with a non-heated liner. I had a pair of custom footbed made at the time of purchase.
I recall doing stops every 2 minutes to wipe my tears from the pain I was having on my feet. :(
Even with custom footbed, I had the feeling my boots were too short. That was until I started to ride. Then I was feeling better about the length. But I have considered selling everything thinking the sport wasn't for me! Until someone gave me the very same advice I am sending you. I by no means consider myself an expert by the way!
After about 6 half days of riding (I just couldn't do more then that), all became better as the liner started to pack up. My only advice is to hang in there for a few more sessions. You might want to wear your boots while watching TV to help pack those liner or get them molded.
I have tried to ride with my old soft boots (Flow Morphan). Although my feets are comfy, I just can't ride without my hard boots for securing that heel down!
Those advice are only valid while assuming the boots are right for you. My feet were pretty wide to start with. So I read somewhere that the Head boots were fitting wider feet better. Also, my feets don't have any abnormalities.
In a nutshell, I can feel your pain, just hang in there for a bit more, if it doesn't get better, then start thinking about going further in boot fitting, custom footbeds or maybe switch boot company if your feets are too wide.
Good luck and let us know how you solved the issue!