I run a site with PR 7 (front page) and other page is PR 6.
There a plan for new design, layout, platform (current is custom CMS, so should be new URL in the future), so what should i do to keep all PR ?
I know about redirect, but how to do redirect from old page to new page (old page will be all gone when the new design out) ?

for example (PR6 page) : domain.com/education.php?article=steps
how to redirect to new page ?
New page might no longer exit or replace with other stuff.