Go to installer and load the following source on a jaibroken Touch 1.1.3:
http://www.modiphone.net/repo
Refresh the sources. Then install: 1.1.3 Touch Apps.
You now have the 1.1.3 apps on your Touch.
OR
1.1.3 jailbroken ipod touch. These are the steps.
1) Im assuming you have a jailbroken ipod touch, so download BSD Subsystem and then OpenSSH.
2) Login to your ipod with Windscp or the mac one with your ip address as host name, root as username, and alpine as password.
3) Go into /System/Library/CoreServices/Springboard.app and rename N45AP.plist to some like N45AP.old.
4) Then change M68AP.plist into N45AP.plist and reboot iPod Touch.
If Mail does not work:
ssh into your ipod. navigate to the applications folder
navigate to the mobilemail.app folder
in that folder edit the info.plist
you need to replace com.modiphone.maps with:
com.apple.mobilemail
respring and it works