If anyone is interested, this program allows you to give someone else the ability to enable and disable ppp/secrets…
http://www.giganet.hr/index.php/besplatan-software/giganet-vpn-enabler (page is croatian but the program is extreamly simple - and free to use)
Note that router password is not stored very securely (for now) so make sure to create a new user for this.
And if anyone has any requests, or runs into a bug, send me an e-mail to tomislav.plecko@giganet.hr
Unfortunatley, this 250k program requires a 50mb .net 4 framework and runs only under Windows.