1. download OpenSSH from cydia
2.download a ftp client flashFXP/filezilla/WInSCP - filezilla is available for mac as well but the other two is windows only.
3. go into settings > wifi connection and check your iphones ip and in your ftp client use this as a connect ip with the username root/alpine and using port 22
now your iphone might need a restart before the ssh starts working but then you need to accept a certificate and once you connect you have full SSH access to all your iphone files, locate the applications folder and you have access to any app on your springboard, just right click and delete and wave bye bye to those default apps you just wish you could of deleted that apple stupidly force you to keep on there. just careful not to delete anything important
also i would advise downloading an app called Terminal and change the default password of alpine. connect and type "su root" it will ask for a password and type alpine then type "passwd" and it will ask you for a new password, then remember to change it in your ftp client..
its security because every openSSH has the same password so any one could easily connect to your iphone randomly and mess with your phone, delete everything..etc
so make sure you change the password