2. 把檔案放到Palm Pre 的USB storage （放在第一層）

3. 執行WebOSQuickInstall, 先安裝optware (我自己係全數安裝optware 的library), command shell

4. 執行以下命令 (Tools -> Linux CommandLine) , 注意space , 可以copy and paste 去執行.../

mount / -oremount,rw
/usr/bin/ipkg -o /var install /media/internal/audiod-config-eu_1.0-5_castle.ipk
/usr/bin/ipkg -o /var install /media/internal/palmcustomizationinfo-wr_1.0-100_all.ipk
/usr/bin/ipkg -o /var install /media/internal/sweatshop-wr-castle_1.0-13_armv7.ipk
cp -Rf /media/internal/com.palm.app.findapps/* /usr/palm/applications/
reboot

(小知識：由於WebQuickOSInstall 不支援cd 指令，所以用了absolute path ...

完成後可以重新使用app catalog ~

要備份舊的app catalog, 可以先輸入以下指令:

# mkdir /media/internal/findapps-1.3.1

# cp -r /usr/palm/applications/com.palm.app.findapps/ /media/internal/findapps-1.3.1

如果下載不到，都可以用webOS Doctor 找出以上檔案：

source : http://forums.precentral.net/gsm-pre/213041-what-i-have-done-keep-app-catalog-after-flashing-1-2-1-firmware.html

I have an o2 german Pre, so with 1.1.3 firmware. I have flashed it with the 1.2.1 Bell firmware and here is the process to not loose the app catalog (should be the same withe sprint firmware).

Open the webosdoctor jar of your "normal" firmware with something like 7zip (don't extract de jar, just open it). Click on "resources". You will see 2 .tar files. In my case, with the german 1.1.3 O2 firmware, i have "wr.tar" and "webos.tar".

Click on "wr.tar" and you will find 3 .ipk files. Extract those .ipk directly on your Pre (so connect you pre to your PC and choose USB drive Go back and click on "webos.tar", then click on ".", then click on "nova-cust-image-castle.rootfs.tar.gz", then Click on "nova-cust-image-castle.rootfs.tar", then click on ".", then click on "usr", then click on "palm"a and click on "applications". Extract "com.palm.app.findapps" folder directly to you Pre.