See here to put the iPhone 1.1.2 apps on your iPot:
Update: Found an easier method (but somewhat more illegal) :
Keep in mind that this is probably illegal and posted here only for illustration purposes.
Update 2: An even easier way to do is to add the following source to the installer:
then you’ll find a new entry “iPhone 1.1.2 Apps for iTouch”.
For Google Maps or Mobile Mail you’ll have to install “Google Maps Prep 1.1.2‚Ä≥ or ‚ÄúMobile Mail Prep for 1.1.2” bfore installing the applications.