Last Updated: Aug 13,2010
Sd Card and can you run them from there?
This is a stock feature in 2.2 Froyo, so you'd need a Froyo Rom for your hero(no official froyo roms)
Or you can try this:
A2SD - android-roms - How To: Apps 2 SD - Project Hosting on Google Code
Either way you'll need root access.
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