From this blog: AndrewBlock.Net
Steam version
- Vista/Window 7:
C:\ProgramData\Steam\PlantsVsZombies\userdata
- XP:
C:\Program Files\Steam\steamapps\common\plants vs
zombies\userdata
Non-Steam version
- Vista/Windows 7:
C:\ProgramData\PopCap
Games\PlantsVsZombies\userdata
- 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.