A white 1000??, thats a new one on me. Is it an original 1000 with a white faceplate/case mod?
EDIT: Use this:
6.60LME-1.8 - Downloads - PSPMOD.com - PSP Forum, Hack PSP, PSV Hacks, PS Vita Hack, PSVita, there are instruction in the download page. Once your done with that, use this:
PSP module checker v3.0 - Downloads - PSPMOD.com - PSP Forum, Hack PSP, PSV Hacks, PS Vita Hack, PSVita, this will tell you what mobo you have.
I only ask because I want to be sure that I dont link you to the wrong application