well as far as i know u cant do that because windows xp RC1 is actually windows xp pro and u cant install xp home over it, u basically have to format it and clean install windows xp home.
also u dont have to install windows 98 first. (just boot from your xp home cd) when u restart pc
just install windows xp home.
also u might need some drivers and stuff for your modem video card etc... but in generall windows xp should detect most of your stuff
