yes, but keep in mind that the RB1000 doesn't have so much storage space, so it's not good enough for cache. You could use it without cache, just for proxy.
If you want cache, install a CF card in the RB1000 and use that
hay you can used that enter on Storge and formating your card and set cach n this card
when you format card and set chach in secondry disk
finished
tell me about eny thing againe
good luck