[pptp-server] Masquerading clients

[Jorge Santos]

I folks

How can i masquerade pptp clients behind aa red hat 7.2 with a stock 2.4.7?
These are win2k798 clients
Thanks in advance
--
   \_/      Jorge Alexandre Santos
   'v'      jorgesantos at valnetsado.pt
  // \\     Tel : 212327300
 /(   )\    Fax : 212327301
  ^`~´^     Valnet Sado S.A.