Any DVD recorder with a SCART input will work with the V+ box. For help with setting up the recorder these guides may be of use to you
http://www.cableforum.co.uk/board/34837803-post3.html. The archive function is on the 'V+ Extras' option in the V+ menu titled 'Copy to VCR/DVD' which allows you to copy recordings to a DVD or video whilst you watch TV.
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I was beaten to it thanks to the V+ locking up whilst I was finding out what the options were called lol