While I appreciate the ease of installing Backtrack on a FAT32 partition, is there any way to install it to an ext2 partition so that it is hidden on a Windows OS (to prevent people from accidently wiping out files).

I'd like to install Backtrack on my USB thumbdrive so that (for example):
'sdb1' would be a FAT32 partition available on Windows and may be used to place commonly accessible files.
'sdb2' would be an EXT2 partition with Backtrack and I would be able to boot off this partition.

Thanks in advance,