Yes you can use them all, that with -NO CAT have most fetures.

The Tomato USB comes in several different editions:

Standard: most basic features; ~300KB JFFS space (5 blocks) available on 4MB flash routers;

Extras: all features of Standard plus built-in NTFS support (starting from build 36), included Linux Ext2/Ext3 and FAT32 filesystem utilities (fdisk, e2fsck, mke2fs, mkswap, mkdosfs), built-in loop device support, some extra Linux commands not included in other builds, and additional color schemes. ~120KB JFFS space (2 blocks) available on 4MB flash. This version is for people who don't really need JFFS space, or have 8+ MB flash routers, and would like to be able to partition/format drives in Linux native Ext2/Ext3 format or in FAT32 format directly on the router without installing any additional tools.

Lite: all features of Standard but no Samba; some very minor features are stripped out of Busybox, about 600KB JFFS space (10 blocks) available on 4MB flash routers;

No CIFS: all features of Standard but no CIFS Network filesystem support, about 420KB JFFS space (7 blocks) available on 4MB flash routers;

VPN: Extras edition merged with SgtPepperKSU' VPN build with Web GUI (no JFFS space left on 4MB flash).

No USB: Initially this was the USB mod… However, it grew up to be an "extended" version of Tomato even without USB support, so starting from build 36 Tomato USB includes non-USB edition (ND only) for routers with no USB ports. This build has about 900KB of JFFS space (15 blocks) available on 4MB flash routers.

You shouldn't lose any functionality but you will gain more options. The nice thing is that if you can give it a try and if you don't like it you can try another firmware or go back to stock.

http://placeshiftingenthusiasts.com/