How to free up space on iPod Touch after Jailbreak

[CrockettGTO]

I have noticed after jailbreaking and installing themes and uninstalling them, installing apps like customize etc that when I uninstall them it leaves a bunch of files behind. I am wondering if there is a safe way to know what we can delete through FTP'ing to the touch safely. Also noticed that the newer version of the installer doesn't inform you how much application space is left. Is there a way to tell this manually?
Thanks

 

[Vigilante]

You can delete the core files under /var/root/Library. It won't really clear much up though... they're mostly ~300kb each.

 

[CrockettGTO]

You can delete the core files under /var/root/Library. It won't really clear much up though... they're mostly ~300kb each.

Thanks Vigilante. I did the work around for getting by the storage limitation that I think is working well also.
BTW what is the .DS Store file i see in all the downloaded themes?

 

[Vigilante]

.DS_Store (Desktop Services Store)[1] is a hidden file created by Apple Inc's Mac OS X operating system to store custom attributes of a folder such as the position of icons or the choice of a background image[2]. By default, Mac OS X will create a .DS_Store file in every folder that it accesses, even folders on remote systems (for example, folders shared over a SMB or AFP connection) and even if the user has only customized the appearance of the folder by moving its Finder window[3]. This is in contrast to the preexisting system for the same purpose used in previous versions of the Macintosh Finder, which would merely place a number of invisible files at the root of the volume being accessed (even on alien filesystems), always storing the settings and metadata for all of the folders in the entire volume within this single set of files.

I don't know if they have any real use on the Touch, though.