XP: C:\Program Files\PopCap Games\Plants vs. Zombies\userdata
So, locate the files on the computer
you're currently playing on. Then,
copy all of the .dat files into the
directory on the computer you want to
start playing on (in my case, I copied
them from the netbook to the desktop).
Note that this will overwrite any
progress on the target computer, but
you probably figured that already.
Note: I can't vouch for XP, but in my
Windows 7 + Steam scenario, the
'C:\ProgramData\Steam\PlantsVsZombies\userdata'
folder is hidden. I had to turn on
viewing of hidden files: Computer >
Organize > Folder and Search Options >
View > Show hidden files, folders, and
drives (works in Vista too). In XP
it's My Computer > Tools > Folder
Options > View > Show hidden files —
or something like that.
Since you are already familiar with the PC version, I'll go into the other ones:
iPhone version
It contains the entire campaign, as well as different achievements (also different Easter eggs, such as what happen if you scroll down the achievement listing continuously). The puzzles are mainly the same as well.
Doesn't have survival mode.
Doesn't come with most of the bonus games (including the plant garden, the tree of wisdom, as well as the Zombiequarium minigame)
These must be purchased with either in-game coins or with real money using microtransactions
All Mini-game packs can be purchased for 50,000 coins each, the I, Zombie game pack for 150,000 coins, the Vasebreaker game pack for 150,000 coins, and the Last Stand game pack for 100,000 coins.
iPad version
Identical to the iPhone version, except it now includes the Survival mode. However, now it includes a new way to improve the power of your cobb plants (by putting butter on enemies first). This is making use of the iPad multitouch mode of up to 11 touches at once (think launching multiple walnut in walnut bowling at once). Still no zen garden.
Best Answer
From this blog: AndrewBlock.Net