512Mb is perfectly good for XP. My everyday system is now a multi-processor system with 2Gb ... is is faster ... of course. However I still support folks on uni-processor systems with 512Mb like my old system and they function perfectly well with XP.
"1Gb minimum" is flat simple rubbish.
Willywonka2
BTW sorry to advise ... once you have made a post your only choice is to edit your posts to remove the content. You (and I) do not have the ability to remove a post entirely.