well last night i decided to reset my galaxy, that went fine but i lost all my creations in my "My Creations folder" and for a good hour i was lookin for a fix so if any one else has the same prob ill post it here all in one spot

To Reset ya Galaxy
go to ya C: drive, then "Documents and settings" then the folder with your user name then "application data" (may need to show hidden files) then to the "Spore" folder inside there is alot of spore stuff, go into the folder called "Games" and remove the game0 folder and any others in there, ya can back em up if ya like.

now im proty sure when ya start back up ya have a new galaxy but your "my creations folder" will be empty but this is how i got my creations back

My Creations population
Start spore go to settings and change to "Buddy content only" and un-tick the only download subscriptions newer than x days box
exit spore ..
follow the steps above to get back to the spore folder in "application data"
once there remove the folder MVJCache and the files GraphicsCache.package Planets.package Pollination.package and RigblockInfo.package
DO NOT REMOVEEditorSaves.package
start spore
now your creations folder will be empty for a little bit but it should start downloadin all you creations again, and it does take awhile to redownload all your creations.

extras:
dont know if it works for ones ya havnt uploaded
im not sure if ya realy need to remove all those .package files but i read to do so and it worked so