Is there any tweak to help clean up the phone storage mem (not the 4G) in stock rom

[Procter]

I've been using Diamond for two days and noticed that it's fairly easy to stuff the phone's internal memory (I'm talking about the 91 MB not the "internal storage" of 4G).

Coming from Touch, I only installed those same old softwares and most of them are installed to the 4G. With only 12 apps, my memory only has 8mb left.

in storage:
SPB backup; Resco explorer; live search; OZ IM; memmaid

In memory:
TCPMP for wm 6.1; IGo 8 (Maps are in storage); 14M font file for unicode; a bunch of small hack cabs for only several kb

I had all those plus Touchpal on my Touch and never ran into low memory problem, but when I was trying to install touchpal the other day on Diamond I got low memory warning.

Do you guys know which software is eating the internal memory most? I'm guessing it's the pre-installed junkies such as Sprint TV, Music and stuff plus Opera. And is there a way to clean up the stock rom a little bit?

Thanks.