I hope somebody can point me in the right direction.

I have had loads of issues since updating Customize to 1.18. Some applications install and others don't. However none of them show up. I check using finder and they all have a blue icon with a question mark.

I used Finder to remove the apps that had this ( there were many) and unfortunately Mobileslideshow.app was one of them. Yes I know I am a donut, but I was iritated by Customize, which also now has the question mark and won't show up on my springboard.

Where can I find the app and can I simply just drop into applications folder?

Is there anybody that can help point me in the right direction?

Do you have 1.1.1 firmware?

Yes I have 1.1.1
and now can't open installer.

Any ideas?

You can extract yourself everything you need, decrypting the 1.1.1 firmware file.

Or try restoring.

Do you have a mac?

I sorted with a 1.1.1 restore followed by upgrade to 1.1.2 and all is now well.