First, use iFile to navigate to /var/root/Library/Lockdown. Scroll down to data_ark.plist and Open With... Property List Viewer.
Turn iPhone sideways/landscape to show enough of the field so you can find the Array named com.apple.mobile.iTunes.store-KnownAccounts. Clicking it will show the accounts you've used in the App store. Click each one so you can see the AppleID, then you will know which DSPersonID you will need in the next step. The DSPersonID is a long number like 1,234,567,890. Write down the AppleID and the DSPersonID for each account you have purchased apps with. You will need the DSPersonID again in a moment.

Say that your iOS device is now always asking for the password for account 0 in the KnownAccounts, even though you've already purchased those apps with account 1's AppleID. You would write down the DSPersonID for account 1.

Ok, click DONE so you close the data_ark.plis file.

Now navigate to /var/mobile/Library/Caches. Turn iPhone sideways/landscape to show enough of the name so you can scroll down and find com.apple.mobile.installation.plist and Open With... Property List Viewer.
Click User Dictionary>
Here is where finding your App can get tricky. Even though you think the app is called, say, Dead Space, you might find it listed as com.ea.deadspace.inc. There is no rhyme or reason to it and I've found at least one app that had a completely different name here than it was called. Alright so you find the app by its bizarre name, and then you click it. The field you want now is ApplicationDSID. It probably has the big long number from account 0 above. You want to change ApplicationDSID to the big long number you wrote down for the account 1 or 2 or whatever that matches the AppleID you used to purchase the app. HOWEVER, DO NOT TYPE the commas. In other words, don't type 1,234,567,890 in the ApplicationDSID field, type 1234567890. This is the reason I said to write it down rather than try to Copy and now Paste it. If you type it with the commas, it will immediately change it to 0 and that won't work. If you type it without the commas, it will display with the commas after you click Done and go look again

http://www.sinfuliphone.com/showthre...t=33907&page=3 .