How to sync apps for ipone and not music, but keep music for classic

When you connect your iPhone and open iTunes there will be a main iPhone screen. On the main iPhone screen just select that you will manually manage music and videos and it won't sync any music or videos with your iPhone.

As with your iPod when connected to iTunes, the iPhone has various tabs for your iPhone sync preferences with iTunes. Your iPod and your iPhone can have different sync preferences.

If you don't want to transfer any music to your iPhone, don't select Sync Music under the Music tab for your iPhone sync preferences. If you don't want to sync any video to your iPhone, don't select sync Movies and TV Shows under your iPhone sync preferences.

Under the Applications tab for your iPhone sync preferences, you will select Sync Applications with the following options below.

All Applications to transfer all available applications to your iPhone, or choose Selected Applications followed by selecting the applications in the window below that you want transferred to your iPhone followed by a sync.