Hi der wizard, wel da solution to ur question is jus quite simple......... all da Y! ids message archive wil b saved under a comman folder located under da "Program files" folder........ da right path address is :
C:\Program Files\Yahoo!\Messenger\Profiles\
Here inside this folder u wil c many folders named wid Y! ids sign-in name depending on da no. of ids logged in usin Y! mess......
So u jus backup this entire "Profiles" folder n sav it at anoder safe place...... den aft all da re-installations hav been done...... install Y! mess n den restore da folder accordingly........
N der u r ....... u hav got ur Precious "Message Archive" folder BAK!!!
Wel wizard it wud b kind if u spell ur name aft all each self's identity is imp.......
I hope u understand wat am saying.
So wizard...... if u hav ny prob wid da bakup n restore procedures of Y! mess message archives...... ask me....... Main hoon na