You are downloading the IM+ XAP file v220.127.116.11 for Windows Phone. IM+ is a free and useful Social app: IM+ supports all major IM services, including Facebook, Google Talk, Yahoo!, AIM/iChat, ICQ, Sina, Mig33, Jabber, VKontakte, Yandex IM, ... You can now download the offline XAP file to install & try it.
Download Locations for IM+ 18.104.22.168 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline IM+ XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.