woah i'm surprised that ME fits in 1GB.
you could use partition magic to resize it, or if you want to be daring, you could use defrag, then use fdisk to destroy the partition and then create a 30GB one and theoretically your data would be there....but thats something that i would never try although it seems to work in most cases.
are there any other partitions????
and where does it say its only 1GB? try doing a scandisk, also do a dir C: and post the results, just the part where it says the size and whatnot.
example:
C:\>dir c:
Volume in drive C is Win2KPro
Volume Serial Number is E098-BBFD
Directory of C:\
blabalkjeflkdsjsaklfjasldkfjlasj files
1 File(s) 679,008 bytes
8 Dir(s) 1,884,016,640 bytes free