Replying to Full Tilts Hurt My Feet

I tried on my friends Red full tilts today, coming from Dalbellos, and at first they felt alright, with a little pressure on my shins. I rode up with them and ski'd down, feeling like a bird. I got about 2 runs in and then on the way up, an excruciating stinging pain began in my feet. It started on the outsides of my arches, and then moved to the middle, it felt very internal, like a there was pressure on a nerve or something, I ran inside and had to take them off, the pain was relieved only a few minutes later. My friend was saying that you get used to them, but there is no way i could have taken one more run. Kinda bumbed that they don't fit me, I was reallly looking foreward to buying some next season. Any ideas to change the boot in any way? Or get rid of any arch support in them, because i am flat footed, or is there any knowledge of a wider model coming out? something that doesnt put pressure on you arches?