You are downloading the Tweet & Walk XAP file v18.104.22.168 for Windows Phone. Tweet & Walk is a free and useful Social app: You can now easily type tweets and take and upload images and send messages while walking to your destination without messing up with traffic on road ... You can now download the offline XAP file to install & try it.
Download Locations for Tweet & Walk 22.214.171.124 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 Tweet & Walk XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.