Dharmabhum

so as i was setting up my compy last night, i followed a tutorial and this dude said that he sets up his active/boot disk as FAT32 and gives about 4 gigs of space, dedicated as the space for his OS and any forthcoming additions to it. as i went through, i did just that, 4gb FAT32 C: drive. but now that i see that i'm installing things, its all going to the c: drive, like program files, windows, all the normal folders you see on the C drive, when i had no choice of where to put these folders. i've partitioned the rest of the drive up as two larger separate drives for the main storage for things. i've left about 10gb unallocated at the moment in hopes of adding it to the initial c: drive. so, its this right now:
C: 4gb FAT32, system disk
J: 364gb NTFS storage disk
Q: 87 gb NTFS storage disk
unallocated: 9.77gb

as i'm going through this whole process of installing things, it all goes to the C drive. 4gb won't work for all that. i see that the drive supposedly must be formatted NTFS to be able to extend it in size (i'm using this MS help now http://support.microsoft.com/kb/325590/en-us ) but if its already FAT32 and its already filling up as the default spot to put shit, am i just screwed? should i just reformat the active boot/system drive as NTFS and just do everything over again? sorry if this is confusing, but its as straightforward of language as i know. thanks yo.