i re-wrote my personal statement. i also had additional profs send in their LOR... maybe just 1 and my pre-health committee wanted an updated resume to add stuff to my committee letter - or so they told me.
i volunteered over the summer and i think i sent in a letter detailing what i had done: stuff i worked with, what additional procedures i shadowed/assisted with, how that experienced has improved me as an applicant. nothing fancy, just a short page.
just for fun, whenever i see someone refer to personal statement as PS... i always misread it as PoS, which i hope it's not. =)