Download Yahoo Messenger Setup on hard drive, and go for installing while offline.
How to Install Yahoo Messenger v.10 Manually:
1) Click here to download Yahoo Messenger v.10 (and save to hard drive)
2) Double Click File “ymsgr_inst”
3) Click Next
4) Check mark "Yes, I accept" (Read License Agreement and Terms before continue)
5) Click Next
6) Click Next (Read Privacy Policy)
7) Click Browse (Enter New path in Path location, or navigate through folder tree view)
i) Click Ok button
8) Click Next button
9) Click next again (Ready to install)
10) Click Finish Button (Installation Completed!)
