Just acquired this thing never used. The IOS on it didn't support NAT, so I snagged a newer (12.1(10)) version. Flashed ok, but insufficient ram to boot. The 4M stick in it is a 72-pin 1M x 36 simm. cisco's heavy into proprietary labelling of ram. Would a 4M x 36 parity simm be likely to work? thanx, -ls-