Nw switch back to Xplore ... Nd try again to open C:/sys .. It shud open nw ..nw jst extract nd copy
Instal Server Os9.1 or
Instal Server Os9.2 file to C:/sys/bin (it shud be the .exe file) ..if its in the C:sys/bin/ then just exit Xplore nd restart ur fone .. Nw u can install 'unsighned' apps wivout sighning .. Wel this is a method i found on otha site ..so do it at own risk ..