I'm afraid, EricJH, that RIPE do now own these addresses as they were assigned to them by IANA on 30 Nov 2011 as shown here:
http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xml005/8 RIPE NCC2010-11 whois.ripe.net ALLOCATED
or if you prefer to ask ARIN about it:
http://whois.arin.net/rest/net/NET-5-0-0-0-1/pftSo I'm afraid these addresses are NOT reserved for VPN use and the longer Comodo EasyVPN continues to use them the higher the likelyhood of these addresses being assigned for use by end users with all the connection problems that will bring for EasyVPN users.