hi,
even if i think this is a funny idea as, if you menu is that high you’ll land on a page of which a lot of content will be already scrolled, this is quite esay to realise with javascript.
on clicking on your link you just have to retreive the page scrolltop, put that in a cookie and on the concerned page, retreive that cookie scroll top value and smoothly scroll you page to it, done
edited ’cause i’ve just thought about another solution, wayfinder is abble to add an id to every link, this way you can simply add this id as an anchor at the end of the link (/mypage#id_8 for example), done too, a bit less smooth but works without js
have swing