Moving App's to SD Card & System Restart

[trench]

What's up G1 Forum?  I own a G1 and have been loving it so far.  I ran into a little issue I need help with.

About a week ago my phone started doing something strange.  Every call I get, or make comes up as "unknown".  Even if the person is in my contacts list.  Even when I call my voicemail.  I contacted T-Mobile and they had me delete browser cookies, emails, text's, and some applications to free up space.  Then turn the phone off and on.... but the problem still occurs.  they then told me I needed to do a "hard restart" (I might of quoted that wrong).  Anyway, It's to my understanding that when you do a restart like this, all my application's will be deleted and possibly ringtones and notification sounds.  I'm wondering if there's a program to move my app's to the SD card so that I don't lose them or have to download them all again.

Also, can someone give me the link regarding how to do this restart?

thanks for the help