hoff your a star
No problemo, if you want a proper (and very cheap) archiving solution, check out Mimecast. We implemented it recently, project went like a dream, and basically just amounted to us having to change some MX records, then handled the rest.
Very very impressive though, can search my archive (held at their datacentre) in half the time I can search my Inbox (held 10m away), they use some sort of 1337 grid structure.
Came in at around £60 per employee, per annum and basically means we can set fire to our exchange server (with a few changes prior), no more worries about applying patches to Exchange!
Drop me a PM if you like, can forward on account manager details.